Good questions.
Plain answers.

A Seiko mod is an independently customized watch built around a Seiko movement and a selected combination of aftermarket case, dial, hands, and bracelet. Our collection includes Seiko NH35 date automatics, NH34 GMTs, NH38 date-free automatics, and VK63 meca-quartz chronographs.

Every watch has a 316L stainless steel case and sapphire crystal. Movement and bracelet or strap depend on the model: NH35 for date watches, NH34 for GMTs, NH38 for date-free watches, and VK63 for chronographs. Each product page lists its specific configuration.

Our automatic watches are mechanical and wind through wrist movement or by hand. The Chronograph collection uses a VK63 meca-quartz movement and needs a battery; it does not wind from wrist movement. The product specifications identify which movement you are choosing.

Date models offer 36 or 39 mm. Land, Explorer, and Everyday are 36 mm; Chronograph is 39 mm; Diver, GMT, and Yacht are 40 mm; Wave Diver is 41 mm. Measure a watch you already like across its case, excluding the crown, then compare. See the size guide.

The two-tone models use 316L stainless steel with gold-tone finishing on the bezel and bracelet details. The color gives them a warmer look; the underlying construction is steel.

All models are rated to 10 ATM / 100 m. This rating describes pressure resistance, rather than a safe diving depth. Keep the crown fully secured and never operate it in water. See our care guide for everyday use.

The metal bracelets have removable links so they can be fitted to your wrist. A local watchmaker can size the bracelet, or you can contact us for guidance. Keep all removed links and pins.

Every watch is built to order. Allow about 7 calendar days for the build before dispatch, plus shipping time. Standard US delivery is typically a further 2–5 business days. We will contact you if your build needs longer.

Yes. Watches are sent with tracking and insurance. You receive a tracking link when your watch is dispatched. Shipping charges and any available service upgrades are confirmed before payment. Read the shipping details.

Email hello@modcoastwatches.com as soon as possible with your order number and the requested change. We can usually update an order before its build begins; later changes depend on the work already completed. Address changes must be confirmed before dispatch.

Every watch includes a two-year limited warranty from delivery covering movement defects and assembly workmanship during normal use. Covered repairs include parts and labor. Normal wear, accidental damage, and damage caused by misuse are excluded. Read the full warranty.

Email hello@modcoastwatches.com for sizing advice, order questions, or watch support. For an existing order, include its number and a short description of what you need. For a technical issue, a clear photo or short video can help us diagnose it.