Seiko Mod Day-Date "Chocolate Roman" Watch

A Seiko Mod is a custom, modified watch (hence the name: Seiko Mod). Each watch is hand assembled by us, in our Somerville, MA studio.

Our watches begin with a genuine, Japanese movement. We take this movement, and complement it with our own custom-produced dials, hands, cases, and bracelets. The specific movement used is listed in the description for each of our products.

Somerville Watch Co. is not affiliated with the Seiko Group. We are an independent watchmaker, and each watch we sell includes a 1-year in-house warranty. Since these watches are custom-made by our company, they will not include a Seiko box and papers.

The answer is simple: because there is simply no way to deliver the premium aesthetics and functionality that we strive for when using fully stock watches as a base for our mods.

If you have any doubts about our products whatsoever, reach out to us via our email, or visit our Customer Reviews page to see what 230+ happy customers have had to say about our watches.

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.

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.

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.

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!

All of our watches are in-stock, pre-built and available to ship immediately unless marked as "Pre Order."

Watches ordered before 12pm EST typically ship the following day, except when USPS is closed (Sunday and US federal holidays) or during severe weather.

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.

Yes we do. Please fill out a custom-build request form at this link!.

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.

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.