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SRPE GMT Modification Parts
Everything you need to build or convert a Seiko 5 SRPE into a GMT, in one place at Watch&Style. A GMT mod adds a fourth hand that tracks a second timezone against a 24-hour scale — and it takes a few specific parts to do it right: the GMT movement, a GMT hand, a GMT bezel, and a chapter ring with 24-hour markings. This collection brings those SRPE GMT parts together.
The NH34 GMT Movement
The heart of an SRPE GMT build is the Seiko (TMI) NH34 — a GMT automatic movement with a true 24-hour fourth hand. It's the GMT counterpart to the popular NH35/NH36 movements, and it's what enables the second-timezone function on the build. The rest of the parts in this collection are chosen to work with the NH34's GMT layout.
GMT Hands
The collection covers a wide range of GMT hands made for the NH34 movement, in styles inspired by popular GMT references — Submariner, Explorer II, GS SBGE, Black Bay Pro, SNR025, and Snowflake — in a broad spread of colours, many with C3 lume. The GMT hand is the fourth hand that points to the 24-hour scale, so pick the style and colour that match the look you're building toward.
GMT Bezels & 24-Hour Chapter Rings
A GMT build reads the fourth hand against a 24-hour scale, which is why this collection includes GMT bezels and chapter rings with 24-hour GMT markings. The GMT bezels come in steel and brushed black, and the GMT chapter rings carry 24-hour markers in a range of colourways — black/white, blue/white, blue/red, black/red, and orange/black — so you can coordinate the GMT scale with your dial and hands.
Building Your SRPE GMT
Pair these GMT-specific parts with the rest of your SRPE build. Coordinate with an SRPE case, crystal, and crown, and browse dials sized for the NH34 to complete the watch. For non-GMT SRPE parts, see the full SRPE mod parts collection.
Frequently Asked Questions
What do I need to build an SRPE GMT?
At minimum: the NH34 GMT movement, a GMT hand made for the NH34, a chapter ring with 24-hour markings, and a dial sized for the NH34. A GMT bezel adds a 24-hour scale on the bezel itself. This collection brings those GMT-specific parts together so you can build the conversion from one place.
What's the difference between the NH34 and a standard NH35/NH36?
The NH35 and NH36 are three-hand automatic movements; the NH34 adds a fourth hand for GMT (second timezone) function, tracked against a 24-hour scale. A GMT build needs the NH34 (or another GMT movement) — a standard NH35/NH36 can't drive a GMT hand.
Why does a GMT build need a special chapter ring?
The GMT hand points to a 24-hour scale rather than the standard 12-hour dial. A GMT chapter ring carries those 24-hour markings so you can read the second timezone — which a standard chapter ring doesn't have.
Browse the full SRPE GMT modification parts collection above to start your GMT build.