Seiko SRP777 Review – The “Turtle” Diver’s Watch

Seiko SRP777 review

In this article, I’m going to write about Seiko SRP777 review, an affordable diver’s watch by the Japanese brand. It’s a step up from the famed Seiko SKX007 and SKX009 with updated movement (7S26 vs 4R36), and of course with a price increase of about $100.

Updated Version Of Seiko 6309 “Turtle”

This SRP777 is actually a new Seiko Turtle diver’s watch, made in homage to the Seiko 6309 that’s popular in the 1970s-80s. The 6309 has this peculiar steel cushion case (the case portion that sticks out from the sides of the watch) that’s well loved by fans. So now you know why its nickname is Turtle.

Seiko 6309 Vintage

A vintage Seiko 6309 – the old Turtle – from the 80s. Notice how Seiko plays safe by copying almost all of the design aspects of this vintage? Call them lazy but if it ain’t broken, why fix it?

Up until nowadays, the demand for vintage 6309 has never faded and it still retails second hand for around $100-$200. Now, I don’t really know how much the watch sells during the 80s, but I bet it must be lower than $200 for sure which means it must retain its value quite well.

Not too shabby for a Seiko eh?

So Seiko noticed this demand and gives what their fans wants: a total re-release of the well loved 6309 with movement update and some minor aesthetic change. The overall look is just about the same though.

They are very careful not to mess it with a watch that’s already great to look at. Plus, they want to capture all those nostalgia that fans have. Now that’s a great marketing strategy.

Enough about the vintage 6309, now let’s take a look at the Seiko SRP777 review, the new turtle diver’s watch.

Seiko SRP777 review turtle

Introducing Seiko SRP777 – the new Turtle

Seiko SRP777 Turtle Specification

Diameter: 45 mm
Thickness: 13 mm
Lug Width: 22 mm
Lug to Lug: 48 mm
Case: Stainless steel
Strap: Black silicone strap

Dial: Matte black dial
Watch Crystal: Hardlex crystal
Hands: Arrow hands with lume
Markers: Index markers with lume
Bezel: Unidirectional rotating bezel

Movement: Seiko Caliber 4R36 Automatic Self-Wind movement
Movement Features: Japanese made in-house movement, 24 Jewels, 21600 vibrations per hour or 6 beats per second, Hacking, Manual winding
Accuracy: +- 15 seconds per day
Power Reserve: 41 hours

Water Resistance: 200 m
Other Features: ISO 6425 Diver’s watch compliance, Suitable for SCUBA diving, Seiko’s LumiBrite lumes, Screw down crown and caseback, Day Date function

Best Place To Buy: Amazon

Unique Cushion Case

The first thing anyone would notice on the SRP777 is the wide watch base that make it look oversized. But that’s not the truth though. In actuality, the case is just enlarged at the top and tapers down towards the caseback – creating a unique steel cushion case.

It’s definitely a very peculiar design that something those people in Seiko can create ( just like that aggressive design on the Seiko Monster). This cushion case make it looks like a turtle looking from top and sides.

Seiko SRP777 Turtle side

Take a look at the cushion case of this Seiko SRP777 – it’s not that big actually. It’s just have an extending sides that tapers down (something like a turtle shell lol!)


One more important aspect is how wearable it actually is. Despite the 45 mm diameter, I believe the diameter at the caseback is only 40 mm. The lug to lug width is 48 mm, giving the watch a more square look. In comparison, most watches with 44 mm diameter has a lug to lug width that’s more than 50 mm.

The short watch makes it easy to fit with most wrists. So don’t let the big cushion case fool you as this is NOT a big watch for sure. It has a 13 mm thickness with 20 mm lug width. A black sillicone strap is used which is great for a diver.

But since it has drilled lugs, strap change is much easier (if you want to use a leather band to make it a work watch, as an example) as the spring bar can be plucked quite easily.


Seiko SRP777 on hand


As with any mid-level Seikos, the stainless steel case is finished with brushed and polished surfaces. With the SRP777, the top of the lugs/case is brushed while the sides are highly polished.

It’s crown is positioned at 4 o’clock which will not obstruct wrist movement like a normal crown position at 3 o’clock.


Legacy 6309 Dial

The dial of this Seiko SRP777 looks alot like the vintage 6309, the watch it’s replacing. Seiko only did some minor changes such as changing the lume pip of the seconds hand to the back tip, adding some markings on the dial such as the Perspex “X” logo (Seiko’s Professional Specification for diver’s watch), “DIVER’S 200m” and “Automatic”. It also has the same matte black dial as its predecessor.

It’s arrow hands are the same bulky hands with luxurious amount of Seiko’s LumiBrite applied on it. The markers are also the same shape as the 6309 version.

As with the hands, the markers are filled with lume. The amount of lume applied on the dial is massive. There is no doubt that this watch will shine brightly in the dark.


Seiko SRP777 Lume Turtle

Seiko’s LumiBrite in action. With a normal lighting, it can lasts for one movie screening (you can also expose it to high intensity torchlight to charge it up for brighter and longer lume)

At the right are the day and date windows which are very functional and practical in every sense. I really love this feature on all my work watches as it makes the watch more functions than just telling time.

As I become older, I’m losing my ability to remember what day and date today is (lol!). So having a watch that has all that info is very practical. There is no need to ask around what day today is, or flip open my smartphone to know what date is today.


Seiko SRP777 review turtle


4R36 Automatic Movement

Inside the SRP777 is the 4R36 automatic self-wind movement, the most important upgrade of this watch over the older Turtle 6309. This is the exact same movement in the Seiko Monster, and basically all other mid-level Seikos in the $200-$350 bracket.

4R36 is actually a downgraded movement from the 6R15 – the movement inside Seiko’s higher grade watches such as the SARB, SARX and Presage lines. It has about the same accuracy of +-15 seconds per day.

The main difference between these two movements are the absence of SPRON510 mainspring inside the 4R36. This mainspring (a proprietary material from Seiko) helped to give the 6R15 a good 50 hours power reserves. Whereas the 4R36 only has 41 hours power reserve without it.

The movement uses 24 jewels inside it, and has 6 beats per second for that sweeping seconds hand action. It also has hacking and manual winding features, something that the older 6309 doesn’t has.


ISO 6425 Complied Diver’s Watch

Another great thing about the Seiko SRP777 is it’s complied to the ISO 6425 diver’s watch standard. With it’s 200 m water resistance, there is no problem for it to be used underwater. Countless Turtle fans have expressed how great the watch perform during dives.

Great dial design, super bright long-lasting lume and comfortable on wrist – what else could a diver want? Not to mention it’s much cheaper than those expensive diver’s watches so you won’t really mourn should it got badly damaged lol.


Watch this video to have a closer look at the Seiko SRP777

Who Is The Turtle SRP777 For?

It’s definitely for those that want a pure functional diver’s watch, and don’t really care how fanciful the watch is. It’s not the best looking watch for sure: the cushion case is weird, the dial is simple and looks basic.

But this watch is filled with great functionality all around. LumiBrite ensures the lume stays up to hours provided its charged beforehand.

The simple dial gives clear visibility – there is no problem of telling time in any condition with the contrasting markers and black dial. The sillicon strap is to make it easy to fit the watch over a wetsuit.

Just like the SKX007, this SRP777 is a watch purely meant for divers and sportsmen with a good upgrade of movement (hacking and manual winding).

But the cool and stylish look of the diver’s watch means its also a great timepiece for casual or work use –  just change the strap to a leather or Nato and you are done =)


Seiko SRP777 leather band

Put a leather band and poof! It transforms into a stylish watch perfect for casual use =)

Who Should NOT Get This?

Basically those that want a more refined dial and case should not get this watch. As stated above, this is a true diver’s watch and not a fancy pretty watch. The turtle casing will turn off many people as the very simple dial will.

For a more beautiful casual timepiece, have a look at the Seiko SARB033, and the SARB017. Both has more beautiful dial design but still can be worn for casual and work use.


seiko sarb033

For something prettier, check out this understated but elegant Seiko SARB033

Pros and Cons


  1. Unique turtle-like cushion case
  2. Great legibility with big bold markers and hands
  3. Long lasting and bright LumiBrite lume
  4. 200 m water resistance
  5. Diver’s watch with ISO 6425 standard compliance
  6. Very functional with day date displays
  7. Robust 4R36 movement


  1. Cushion case is a bit weird and might turn off some people
  2. Too simple dial design


Seiko SRP777 on hand side


Seiko SRP777 For Sale On Amazon!

If you want to buy the Seiko SRP777, look at Amazon for the best prices. The MSRP of this watch is around $475 (taken from Seiko USA website) while Amazon sellers typically lists it for around $300, and sometimes even lower than that. Click the link below to check out this watch on Amazon.

->Click Here To Check The Best Prices Of Seiko SRP777 Turtle On Amazon<-

Final Thoughts

Seiko really have some crazy designers. The Seiko Monster brought a whole new level of design aesthetics that never been seen before. The Turtle on the other hand gives a really unique case design that no one ever thought of.

With this SRP777, fans of the original Turtle 6309 can enjoy their favorite watch with an update look and movement. With so many functionalities, this is a great diver’s watch all around.




Hope you guys enjoy my Seiko SRP777 review. If you have any questions or comments on the watch, feel free to put it inside the comments section below. Till next time.


Seiko Monster Review – The Aggressive Dive Watch

Seiko Monster Review SRP313

Hello guys! Today’s post will be about Seiko Monster review, an entry level dive watch from the Japanese brand. From the first look you will notice that this is a very unique watch with those aggressive styling on the dial, bezel and case – befitting of the nickname “Monster” given to it. Let’s get on to this Seiko Monster review =)


Seiko Orange Monster

Seiko Orange Monster – SRP309


Seiko Monster 2nd Generation Review

The watch I’m reviewing is the second generation of the Monster with ID code of SRP303 to SRP315. Yes, there are about 5 different variations of the Monster with different dial colors. The most famous is of course the Seiko Orange Monster with the very eye-catching bright orange dial (as shown on picture above).

The first generation of the Monster has watch ID code of SKX779 to SKX781. For those that know Seiko watches well, you might be able to relate that the first gen Monster is related to the famed SKX007 and SKX009 since they share the SKX code series. Both watches are famous for being a cheap workhorse.

This second generation Monster features an upgraded movement (from 7S36 to 4R36) that hack and can be manual wound. It can be gotten for around $200 to $300 on Amazon, though the price can sometimes creep up to $500 depending on stock availability.

An interesting fact is the first gen watches are almost nowhere to be found. I suspect Seiko already stopped production of it – I can’t confirm this though, if any of you have any info about this, please let me know.


Seiko Monster first Generation skx779

Seiko Monster First Generation SKX779


So scarce is the first gen Monster that the few units left sold in Amazon even lists for $600! Now you don’t have to feel left out since I can assure you the first gen is not a better watch than this second gen from all aspects. But collectors would perhaps have different opinion on this =)

Now, Seiko also produced a third generation Monster, but this time in the SBDC family (SBDC023-025) featuring a higher grade 6R15 movement. The SBDC family is famed for being a “Prospex” line of dive watch models – that’s Seiko’s “Professional Specification” grade of dive watch, a higher grade of Monster which I’ll cover very soon. So now let’s see the specs of this watch.


Seiko Monster (2nd Generation – SRP Series) Specification

Diameter: 42 mm
Thickness: 13 mm
Lug Width: 20 mm
Lug to Lug: 47.5 mm
Case: Stainless steel case
Strap: Stainless steel bracelet

Dial: 5 variations (black, orange, combination of black and orange,)
Watch Crystal: Hardlex crystal
Hands: Bar hands with lume
Markers: Triangle index markers with lume
Bezel: Unidirectional rotating diver bezel

Movement: Seiko Caliber 4R36 Automatic Self-Wind movement
Movement Features: Japanese made in-house movement, 24 Jewels, 21600 vibrations per hour or 6 beats per second, Hacking, Manual winding
Accuracy: +- 15 seconds per day
Power Reserve: 41 hours

Water Resistance: 200 m
Other Features: Day/Date feature, Screw down crown, Seiko’s LumiBrite lume on hands and markers, Screw down caseback, Certified ISO 6425 Dive Watch

Best Place To Buy: Amazon


Aggressive Dive Watch Dial

The dial of the Monster is the most stand out element that this little timepiece has. It features an aggressive style with the big bold triangle markers (which also looks like fangs) and big hands. Both of them are generously filled with Seiko’s LumiBrite to give extraordinary lume brightness in dark condition.


The use of fang like markers really steal the show as its very unique and something out of ordinary. Coupled with the hands, the dial becomes much busier than a normal dive watch would be. At the edge of the dial are minute markings to help with accurate time reading.


Seiko Black Monster SRP313

Seiko Black Monster with a red accent that gives it an added dimension to its aggressiveness


At the 3 o’clock are day and date display. Some people might say that a true dive watch can only has a date window (something like the Submariner) but in my opinion the day display is a very important feature.

Of course a dial without both will make it much better due to symmetry but to have day/date is going to make your life much easier. Trust me on that =p


Seiko monster lume

Seiko’s LumiBrite applied on the Monster will definitely gives a satisfying lume performance


On top of the watch is a hardlex crystal. It’s a type of watch crystal that Seiko made specially by hardening mineral crystals. It gives a higher impact resistance while also increase its scratch resistance.


Many Dial Variations To Choose From

Seiko produced the Monster with many color variations but the most good looking ones (at least for me lol) is the Orange Monster (SRP309) and the Black Monster with red accent (SRP313).

Seiko Orange Monster

The famous Seiko Orange Monster


The Orange Monster need no introduction. It’s the most popular among the lot and most people associate it with the Monster model. In fact, a quick check on Amazon shows this is the most reviewed Monster model (more than 200 reviews) than the average 50 reviews gotten by others.

It’s no surprise as it’s very unique and eye catching. Truly a fun watch to wear for casual weekends.

Black Monster with the red accent is a step up of the normal Black Monster. The red lining along the markers accentuates the fang markers, making them stand out more from the black dial. It’s less striking than the orange one, but still packs a lot of punch nonetheless.

Without a doubt, the Monster is truly a unique watch. The dial design is totally out of this world. Its big fang like markers are really one of a kind that none other watches dare to try. But in doing so, Seiko has managed to capture many fans that love its peculiar style.


An Equally Rugged Case

The case of the Seiko Monster is also equally rugged and has that tough unique look, befitting its dial. The first thing that we will notice is the unidirectional rotating dive bezel and sides of the watch that has scallop design with some textures on it.

Those teeth on the bezel gives it an aggressive look while also make gripping the bezel easy. There are also minute markings on top of the brushed stainless steel bezel.


Seiko Monster Bezel Sides


It’s quite rare to find a watch bezel with stainless steel finish – they are usually painted with the dial color (you can see the black bezel of the SKX009 and pepsi red/blue bezel of the SKX009). Again, this is one part of the Monster that’s very different than conventional dive watch.

The watch diameter is 42 mm, a size that’s just perfect for most men wrists. Its thickness is 13 mm and has lug to lug width of 47.5 mm. It has a 20 mm lug width that comes with either strap or stainless steel bracelet. In short, the watch is comfortable to be worn – as expected of a Seiko dive watch.

A screw down crown is located at between 3 to 4 o’clock position and guarded by another unique crown guard that I’ve never seen before. Seiko opted to use a shroud-like crown guard design that’s extended from the lug, a totally different design than the normal crown guards on dive watches today.

Another detail that Seiko put on this watch is the inward sloping of the bezel that’s help with protecting the crystal somewhat. To make it sweeter, the Monster is a certified ISO 6425 dive watch that’s surely will give you the important assurance if you want to use this watch to dive. It’s case has water resistance up to 200 m.


Seiko Orange Monster Nato

For those that dislike the bracelet, a Nato strap is a great combination to the Monster. Since the dial is very busy with those big markers, a plain Nato strap will do well to tone down the overall look of the watch


All in all, the case is executed perfectly and looks very sturdy. With an ISO rated dive watch certification, this Monster is certainly going to withstand whatever punishment comes onto it =)


Updated Seiko Caliber 4R36 Automatic Movement

Another major difference from the first generation of the Monster (apart from the dial design) is the updated movement 4R36, from the older 7S26 movement (like what SKX007 and SKX009 have).

The 7S26 is bomb-proof, except for the fact that it does not have manual winding feature, non-hacking and lesser accuracy. Other than that, it’s perfectly fine to be used as rough as you could as noted by many SKX owners.

The updated 4R36 is actually a downgraded 6R15 movement or popularly known as Seiko’s answer to ETA 2824. 4R36 is based on the 6R15 (which is mostly used in Seiko’s mid-range watches such as the Perspex dive watches and SARB series).

But the only difference is it does not have SPRON510 mainspring – a proprietary mainspring by Seiko that gives extended power reserve up to 50 hours.

Without the SPRON510, the 4R36 has 41 hours power reserve while all other elements are about the same I believe. It has 24 jewels in the movement while vibrating at 6 beats per second.

Unlike the older Monster, this version has hacking and manual winding, both are the new typical functionality of any modern automatic watches.

As for the accuracy, reports from owners give the Seiko Monster glowing remarks. It’s consistently below 6 seconds per day accurate (that means it will gain or lose not more than 6 seconds per day). It’s a great aspect of the movement that has an advertised accuracy of +-15 seconds per day.


Seiko Black Monster Review SRP313


Who Is This Seiko Monster For?

So who is this Seiko Monster for? In my opinion, it’s a perfect watch for those just getting into the automatic watch scenario but don’t want to settle for cheap automatics (like the SNK809 which is just around $60).

But with the higher price tag it has it’s own character and certainly much cheaper than other Swiss watches out there.

It’s also a great dive watch for casual use. Those who have dive watches will either hate it (because of its peculiar look) or totally love it (due to its unique un-dive watch like look).

It also has a very distinct design that’s out of the ordinary submariner-like dive watches out there. Being an ISO certified dive watch also makes it a great value for money.


Pros And Cons

1- Unique and distinct design unlike other dive watches
2- Rugged and sturdy case
3- ISO 6425 dive watch certification
4- Updated movement from the original Monster

1- Out of ordinary look with aggressive dial might put off some people


Seiko Orange Monster Review 2


Seiko Monster Price? Where To Buy?

Amazon is the best place to buy these Seiko Monsters. News that I got is Seiko typically mass produced one model of their watches at a certain period annually and then ship those watches worldwide.

Then they move to manufacture other models. This cycle gives the fluctuating price of their popular watches (SKX007, SKX009) and the Monster is no different.

At the time of writing this article, the price for the SRP313 (Seiko Black Monster with red lining markers) is about $250 which is still tolerable. But what’s shocking is the price of the Seiko Orange Monster (SRP309) that can even reach $500!

Well, the orange monster is the most unique and popular model of the lot, but to be sold at $500 when it can be had for about $200-$300 normally is just insane!

My recommendation for those wanting the Orange Monster is to wait for price to go down when Seiko released the newly manufactured watches into the market. Click the links below if you want to check the watches on Amazon.


->Click Here To Check Out Seiko Orange Monster SRP309 On Amazon<-

->Click Here To Check Out Seiko Orange Monster SRP307 On Amazon<-

->Click Here To Check Out Seiko Black Monster SRP313 On Amazon<-



Seiko Monster is a very unique dive watch that has built itself a massive fan base.

It has an aggressive styling with those fang-like big markers and scallop bezel and case. Built sturdily with an ISO 6425 certified dive watch and 200 m water resistance, this is definitely a great value for money watch.




I hope you guys like this Seiko Monster review post. If you have any comments or questions, please drop it down below. I would love to hear what you guys think about the Monster. Till next time.