Case
- Material
- stainless steel
- Diameter in mm
- 41 mm
- Case back
- stainless steel
- Watch glass
- sapphire crystal
- Bezel material
- aluminum
- Diamond bezel
- No
- Water resistance
- 20 bar
Movement
- Movement type
- automatic
- Caliber
- MT5652
- Manufacture caliber
- Power Reserve
- 70 Hours
Functions
- Second
- center seconds hand
- Date
- date
- Second time zone display
Dial
- Dial color
- black
- Hour marker
- hour markers
Strap
- Bracelet material
- fabric
- Bracelet color
- black
- Clasp material
- stainless steel
- Clasp color
- pin clasp
Manufacturer specifications
- Reference
- M79830RB-0003
- Warranty
- 5 years’ manufacturer warranty plus 1 year Wempe warranty
- Certification
- COSC
The Black Bay GMT is an extension of the Black Bay line with a highly functional complication: a multiple time-zone function – also known as a GMT function. Recognisable by its rotatable bezel, which derives its deep blue and burgundy colour theme from other models in the Black Bay line, but in a matt version, the Black Bay GMT is also a nod to the early days of this watchmaking function.












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