GMT Watches

Mechanical GMT watches built in the Rexx workshop

This collection brings together compact 36mm SubmergeRexx models, 40mm everyday GMT builds, and the 41mm Super Ocean GMT. Each watch uses a dedicated 24-hour hand to keep a second reference time visible while the main hour and minute hands show local time.

Choose the case by how you wear it

The 36mm models give the familiar GMT layout a compact wrist presence and a 12mm stated thickness. The 40mm SubmergeRexx models provide more dial and bezel presence at a stated 13.5mm thickness. The 41mm Super Ocean GMT is the more substantial tool-watch option, with the independently upgraded 20 ATM specification shown on its product page.

What the NH34 GMT movement does

The TMI NH34 is an automatic caller-style GMT movement. Its main hour and minute hands set together, while the 24-hour hand can be adjusted independently from the first crown position. That makes the fourth hand useful for home or reference time. A rotating 24-hour bezel can offset that reading when another reference zone is needed. It is not a traveller-GMT movement with an independently jumping local-hour hand.

Workshop-built, clearly specified

Rexx assembles and checks these watches in the workshop, including hand clearance, GMT alignment, crown operation, and final presentation. Product pages identify the visible bezel and hand combinations so similar models can be compared without guessing. Existing product images, prices, and configurations remain unchanged.

For a personal dial, hand set, or color direction, start a custom watch conversation with Rexx. For a clear comparison of this caller-style NH34 behavior with a traveller GMT that has a jumping local-hour hand, read The Watcher HQ caller GMT vs traveller GMT guide.