Somerville Watch Co.
Seiko Mod GMT "Pepsi" Dive Watch
Seiko Mod GMT "Pepsi" Dive Watch
ONE YEAR WARRANTY
- SHIPS WITHIN 24 HOURS
- FREE WORLDWIDE 2-5 DAY DELIVERY
In stock
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Introducing the Seiko Mod GMT "Pepsi" Dive Watch - a stunning addition to any watch collection. This men's watch boasts a NH34 automatic mechanical movement, ensuring accuracy and reliability, as well as the ability to track up to 3 time zones at once.
Case Measurements:
- Size: 40mm
- Thickness: 12mm
- Lug-to-lug: 47mm
-
Lug width: 20mm
Key Features:
- Case Material: Polished 904L stainless-steel, GMT inspired case with screw-down crown.
- Bracelet: Jubilee bracelet with secure-fit, double-locking clasp and glide-lock functionality.
- Dial: Black enamel dial with highly-luminescent, hand-applied indices.
- Water resistance: 100m/330ft of water resistance. Individually tested to a minimum of 6 bars during our QC process.
- Scratch-resistant Sapphire Crystal
- Scratch-resistant Ceramic Bezel
- Japanese-engineered Seiko NH34 GMT Automatic Mechanical Movement
Hand assembled in our Somerville, MA studio.

Frequently Asked Questions
Will I have to pay any new tariffs on my U.S. order?
Unlike our competitors, we do not dropship our watches from overseas. What sets us apart is that we are a wholly U.S. owned and operated company.
If you are an American customer, that means your order will ship from Somerville, Massachusetts, and you will never have to pay any import duties or tariffs.
Where are you located?
As our name implies, we are located in Somerville, Massuchussets, USA. You can read more about our company and its founding on our About Us page.
Do you have a physical location/boutique?
We are an e-commerce only business, with no plans for opening a physical location.
For logistical reasons, we are unable to offer local pick-up from our workshop. We do however offer free shipping to all customers, regardless of their location.
Do you offer a warranty?
All of our watches are covered by a 1 year warranty for issues related to the movement or craftsmanship. If you experience issues with your watch, we will happily repair the watch free of charge.
If you are outside of the warranty period, we are still available to help you diagnose and repair any issues you may have. Just reach out to us via email!
How quickly do your watches ship?
All of our watches are in-stock, pre-built and available to ship immediately unless marked as "Pre Order."
Watches ordered before 8pm EST ship the next day, except when USPS is closed (Sunday and US federal holidays).
What are your shipping speeds and prices?
For the most accurate delivery estimates and pricing, add an item to your cart and enter your mailing address at checkout. The checkout page will then populate with real-time pricing and delivery estimates provided by our delivery partners: USPS, UPS, and DHL.
Shipments within the U.S. are FREE and arrive within 2-5 business days, depending on your location. U.S. customers can also opt for expedited paid shipping.
For international orders, we offer FREE expedited shipping to over 100 countries through FedEx and UPS. Both of these services deliver worldwide within 2-5 business days.
Do you create custom builds?
Yes we do. Please fill out a custom-build request form at this link!.
Is my payment information secure?
Our website and payments platform is powered by Shopify, which complies with all six PCI standard categories, making it among the most secure payment platforms on the web.
What is the difference between the Premium Dial and Standard Dial GMT and Submariner watches?
Despite the name difference, both of our GMT and Submariner dial options are premium and have identical quality in terms of finishing, lume, and cost. Both dials are constructed of the same high-quality copper.
The only difference is in the face of the dial itself. The Premium option includes a printed logo, and is designed as an homage to the GMT-Master and Submariner dials. The Standard dial is more understated and minimalist in terms of the amount of text on the face, and includes a metal logo instead of a printed logo.
The Standard dial the only option we carried when our website launched. When we began offering the Premium dial, that moniker was chosen simply as a way to differentiate the watch.
I got this watch because this is something I wanted Seiko to do but they didn’t and Somerville does it really well. The watch is really well made and feels great to wear. Looking forward to buying more watches in the future.
Thanks for the kind review, Sakthivel! The watch looks great on you!
I bought this watch the Seiko “Pepsi” mod for my husband for Christmas and he absolutely loves it! The amount of compliments he receives is unreal. The customer service is uniquely accommodating and rare to find when shopping online. I was leery purchasing a seiko mod at first but the automatic response, especially at 10pm at night was unmatched to anything I’ve found. Definitely buying again…. Thank you!
Thank you for the kind review!
I've bought 3 watches from Somerville in the past 4 months. The first was a Pepsi GMT, the second a Batman GMT and the last a modified deblinged King Tut with a stainless only bracelet with white numbers and indices on the insert. All three are terrific watches and run within 5-10 sec.on the timegrapher in accuracy. My best friend lusted after the Pepsi, so I gave it to him as a gift and therefore it's not in the photo. The service and watch quality at SWC are unmatched, so do yourself a favor and pick a watch. You won't be disappointed.
Thank you so much for the review, John! We appreciate your support!
great communication, fast delivery and exactly as advertised, great piece and in excellent condition, definitely will buy again!
Thank you so much for the review, Je!
I was quite impressed with the quality and how fast was the build. I will recommend this CO. To everyone I know. Great watch.!
Thanks for the review, Marcello!
I ordered this amazing GMT Pepsi mod when they were out of stock. Immediate communication on the timeline to get the watch. Updates on the process and they even sent pictures while they were making it. So cool! Get the watch 3 days after it was shipped and, hot dang, it was a beautiful watch! Made with quality part and haven’t taken it off since I got it. Plan to order more watches in the future. Be like me and order a great watch from a great company!
Thanks so much, Brandon! We appreciate you spreading the word about SWC!
I absolutely love my Seiko GMT. Wonderful watch all around. As described and even better. I highly recommend this seller and I look forward to my next purchase from him. Cheers!
Thank you for sharing!
So saw this company on line who sold these smart looking seiko mod watches so i decided to treat my self to one as I have few seiko watches to my collection but not one like these . Checked if they shipped to England which wasn’t a problem so happy days . But when receiving the watch once got it out of the packaging discovering the watch were faulty on that sent them a email on which the owner, a very trustworthy chap at Somerville got me to sent it back to America quickly gave it a repair and them sent it back will also have to give a shout to UPS for a quick service. So now have the watch back in fully working order will have to say i’am not disappointed with this watch or the Somerville company would definitely deal with these again regardless of distance.
Hi Derris, thank you so much for the review! We're sorry again about the trouble with the first shipment. Although very rare, shipping can sometimes result in damage to the movement. I'm glad we were able to get this fixed up for you free of charge - we stand behind every watch we make!
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Let customers speak for us
from 207 reviews
This watch was a special order. I had a Daytona built with date. Looks and feels great. Keeps perfect time.Delivery was fast and packaging was also impressive . Thank you
Love the watch. It matched what I saw and feel in love with on the site.
It really is a stunning piece, and I’ve already received compliments on it. I will be a returning customer!
Ordered the Presidential bracelet as an alternative to the Oyster bracelet I already have. It’s a very different look and is very comfortable . Looks great. I would recommend this if you want to change the look of your watch.
Another great build from Haram and the team at Somerville Watch! I love this ROOTBEER! Can't begin to tell you all the compliments I have gotten on this watch! It's a bit different than your normal one! I got it in Rose Gold and had them take out the Black Face Dial and had them put a Sunburst Brown Face Dial in! Love the look, the comfort on my wrist and boy does this thing shine when out in the light! The bro2n face looks great against the Rose Gold. Each watch I buy just gets better and better! Thanks again Somerville Watch Co.! Already trying to figure out what the next build will be!
The pictures speak for themselves. This is a stunning, eye catching piece that polishes up nice and fits comfortably. The fit and finish is what you’d expect from this price point and overall is satisfactory. The crown threads are a little stiff, bracelet and clasp were a little sharp but not a show stopper. NH34 movement is accurate and sapphire crystal is a nice touch. Shipping was fast and watch came with lots of protective wrapping in box.
Pro tip: All screw pins will need locktite 222 applied after adjusting or these will back themselves out and could separate your band inadvertently. Even if on those you are not removing, unscrew all, apply locktite and screw back in.
My only 2 gripes are - lume is very weak - almost non-existent and price could be about $20 - $40 less as there are many shops offering this same piece for less.
Overall very satisfied with watch and company.
The watch arrived lightning fast and is high quality. It has a nice heft to it, and the gears are smooth. The build quality is excellent, and I was impressed by how it turned out. I can't wait to order a different model!
I love this watch what can I say! Quality is perfect! Not only looks great, on my wrist but runs great as well! I was hesitant at first because I usually wear a bigger size watch but this 40mm fits and looks perfect on my wrist! Thanks to everyone at Somerville for a great watch! Already waiting for my next watch to be built!
Enjoy very much my yacht-master and my GMT and my Nautilus from Somerville. Keeping in time with the classic designs
Love this watch! Couldn't be happier.
This is my third watch and they have all been fantastic so far. I get compliments everywhere I go when I Wear this. Awesome experience great company
Great quality Will for sure buy another.
Beautiful piece, the pvd plating is gorgeous and the sunburst green dial is the perfect contrast to the gold on the rest of the watch, this watch gets many compliments when I wear it. I already ordered a seikoak from Somerville and plan on many more to come
Fantastic craftsmanship, perfect weight. All parts are high-quality. My new “everyday” watch. Will do business with SWC again and recommend you do too!
SWC is an elite watchmaker and their craft is on full display with this GMT mod. My jeweler was stunned, as was I. Photo of the gold GMT next to the Rollie. You can’t spot the difference. Thank you!