Somerville Watch Co.
Seiko Mod GMT "Pepsi" Dive Watch (Premium Dial)
Seiko Mod GMT "Pepsi" Dive Watch (Premium Dial)
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: Premium, GMT-Master inspired 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.
Loving my Pepsi Mod. Only problem is everyone thinks it’s a Rolly. Not mad about it. All kidding aside. Excellent quality. Beautiful. Watch . Can’t wait to pay this off. Going. For Submariner next.
Thanks for the review!
OK Ok I confess. I liked the Batman and Pepsi so much I spent the money and purchased the Sprite,Coke and Rootbeer. Now that's cool! All of them keep almost perfect time after a week.
If your on the fence..go ahead and fall off and buy.
Thank you for the continued support, Bob!
Absolutely phenomenal. I love this watch. Fits my wrist perfectly and is just stunning. Will definitely be purchasing another watch from Somerville.
Thanks for the review!
I’ve been waiting for the invite to leave a review of my Seiko Mod GMT Pepsi from Somerville Watch Co. First, I am extremely pleased with this watch. The watch is beautiful and I've gotten so many compliments on it and many ask if it’s Rolex GMT Master II. I’ve owned an Authentic Rolex Black Submariner (16613). I would have loved to purchase a Rolex GMT Master II, but the cost anymore are way outside my price point. I started looking for a quality watch similar, but under the a trusted name in the industry when Somerville Watch Co. populated on my search. It simply was what I was looking for and the quality is top-notch. The watch is very accurate. More accurate. Shipping was light-speed. I ordered on Feb 5, 2025 and had it on my wrist on Feb 8th. This won't be my last watch from Somerville Watch Co. After this purchase, I will be looking at another watch from Somerville Watch in the near future. I confidently say, you will be more than happy with the quality of their watches.
Thank you for the kind review!
Thank you so much for the review, Travis! We look forward to your next order!
I recently bought a watch from Somerville watch company. The watch was excellent quality. However, after a few weeks of wearing the watch, the movement started to give me issues. Somerville watch took it back and covered everything. I couldn’t be happier with the experience. They have lightning fast service and they fully stand behind their work.
Thanks for the review, Ethan! We're sorry that the movement in your watch seized up, but we're happy you gave us the chance to make it right. We stand behind each and every one of our watches. Your repaired watch is on the way
Really digging my new watch and it's become my new daily driver. Highly recommend the seller! Will do business again in the future.
Thanks, Bill! A diver makes a great daily driver. I guess you can call it a daily diver?
I have one of SWC's Batgirl watches with the old dial, and have been eyeing a Pepsi. I had to get this new option once I saw it had been released. I am really happy with both of these watches and will continue to go to SWC whenever I need a watch in the future. They provide great customer service and the watches are well worth the price!
Thanks, Dan!
Have had the watch for about a month. Love it so far, but interested to see how it holds up over time. If it does, I plan to purchase more watches.
Thanks for giving us a chance, Kevin!
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!