Tudor Black Bay 58 GMT Jubilee 39mm 7939G1A0NRU

Overview

The Tudor Black Bay 58 GMT 7939G1A0NRU ("Coke") is the Black Bay 58 with a true flyer GMT complication — the local hour hand adjusts in one-hour increments without stopping the movement, packaged into the same 39mm, 11.7mm slim-profile case as the standard BB58. That complication in that case size, with COSC and METAS dual certification, at this price point, is the specification argument. No other manufacture currently delivers this combination directly.

The case is 39mm stainless steel at 11.7mm thick — the BB58's defining dimension, retained without modification for the GMT. The black and red bicolour aluminum bezel carries a 24-hour scale tracking the second time zone; the collector shorthand is Coke, which describes the colorway precisely. The gilt-toned dial references the vintage Tudor Submariners of the late 1950s — a detail that sits with more conviction on the BB58 GMT than on the standard references, because the vintage pieces that inspired it were tool watches with a specific purpose, and so is this. Five-link Jubilee bracelet with T-Fit clasp.

The Calibre MT5450-U carries COSC certification alongside METAS Master Chronometer certification — independently verified accuracy between 0 and +5 seconds per day on the wrist, with anti-magnetic resistance to 15,000 gauss. The flyer GMT mechanism advances or retreats the local hour hand independently of the running seconds, so the movement never stops during a time zone change. Power reserve is 65 hours; water resistance is 200 metres.

The BB58 GMT's value position is specific: flyer GMT function, dual COSC and METAS certification, 39mm case, at RM18,800. The next GMT with equivalent or higher movement certification from any other manufacture enters at a substantially higher price point. Within the BB58 range, the GMT is the watch where the complication justifies the step up; for a buyer who travels or works across time zones, the one-push hour adjustment is a daily-use function rather than a collector specification. Brand new, unworn, complete with box and papers dated May 2026, at RM18,800.

Specifications

Brand :	Tudor
Model Name :	Black Bay 58 GMT
Reference :	7939G1A0NRU
Material	Stainless Steel
Movement :	Tudor Calibre MT5450-U, 65 Hours Power Reserve, Automatic, COSC & METAS Certified
Case Diameter :	39mm
Bracelet / Strap :	Jubilee 5-link Stainless Steel
Features :	True flyer GMT, 200m depth rating, Anti-magnetic to 15,000 gauss

Condition

Brand New, Unworn Condition, Complete Original Set with Box and Papers dated May 2026.

Warranty

5 year original manufacturer warranty.

Further Insight from Our Specialist Team

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