Tudor Black Bay 58 GMT 'Coke' 7939G1A0NRU

The Tudor Black Bay 58 GMT “Coke” Ref. 7939G1A0NRU combines the vintage-inspired charm of Tudor's celebrated Black Bay collection with the practicality of a modern GMT complication. Introduced at Watches and Wonders in 2024, the Black Bay 58 GMT takes inspiration from the golden age of international travel, when mechanical GMT watches became essential instruments for pilots and frequent travelers. Its compact 39mm stainless steel case measures just 12.8mm thick, offering considerably more restrained proportions than the larger Black Bay GMT. The defining feature is its striking bidirectional 24-hour bezel with a black and burgundy anodized aluminum insert, earning the watch its “Coke” nickname. A domed black dial features gilt-applied hour markers, warm gold-tone accents, Tudor's signature Snowflake hands, and a distinctive burgundy GMT hand that complements the bezel. A date window at 3 o'clock, domed sapphire crystal, screw-down crown featuring the historic Tudor rose, and 200 meters of water resistance complete the vintage-inspired design. The watch is available on a rivet-style stainless steel bracelet with Tudor's T-fit rapid-adjustment clasp, offering a combination of classic aesthetics and modern everyday functionality.

Inside is Tudor's Manufacture Calibre MT5450-U, a sophisticated automatic GMT movement developed specifically for the compact Black Bay 58 GMT. The 34-jewel movement operates at 28,800 vibrations per hour and provides approximately 65 hours of power reserve, incorporating a variable-inertia balance and non-magnetic silicon hairspring. Notably, the MT5450-U is both COSC-certified and METAS Master Chronometer certified, requiring the complete watch to meet demanding standards for precision, magnetic resistance up to 15,000 gauss, water resistance, and power reserve. Its true traveler's GMT functionality allows the local hour hand to jump independently in one-hour increments without interrupting timekeeping, automatically advancing or reversing the date when crossing midnight. The additional 24-hour hand continuously displays home time, while the rotating bezel can be used to monitor a third time zone. The Black Bay 58 GMT represents an important evolution of Tudor's modern sports-watch lineup, introducing a fully integrated, Master Chronometer-certified GMT movement into the collection's celebrated 39mm case. With its distinctive black-and-burgundy bezel, gilt dial, compact proportions, and technically advanced movement, the Ref. 7939G1A0NRU captures the appeal of a classic vintage GMT while delivering the precision and reliability of contemporary Swiss watchmaking.

Reference: 7939G1A0NRU

Dated: 2026

Bracelet: 5 Link Stainless Steel Bracelet

Case Size: 39mm x 12.8mm Thickness - Stainless Steel

Lug Width: 20mm

Movement: MT5450-U - Automatic

Functions: HMS, Date, Power Reserve 65 hours, Dual Time Zone

Box and Papers: Inner/outer boxes, and warranty card

Bracelet size: 7.75”

Case has little to no wear. Bracelet has no wear. Dial, hands, and crystal have no wear.