Tudor
Tudor MT5612
Swiss lever · introduced 2019
Beat rate
28,800 vph
Power reserve
70h
Jewels
28
Introduced
2019
Escapement
Swiss lever
The MT5612 is Tudor's in-house GMT caliber, sharing the twin-barrel architecture and silicon hairspring of the MT5402 but adding a quickset fourth-hand GMT complication. It brought the Black Bay GMT into the in-house era and is notable for independently setting the GMT hand in one-hour increments without stopping the seconds hand.
Specifications
Beats per hour
28,800
Jewels
28
Power reserve
70h
Diameter
26.0mm
Height
6.0mm
Escapement
Swiss lever
Introduced
2019
Finishing
Commercial
Service interval
8 years
Service cost tier
Mid-range
Complications
gmtquickset gmt
Known service issues
- GMT quickset mechanism requires correct lubrication at service; skip this and the detent click can become stiff
Notable in
- Tudor Black Bay GMT 79830RB
- Tudor Black Bay GMT S&G 79833MN
References in our catalog using this caliber
- Breitling Superocean Heritage '57 A10370A71L1X12020–present
Buying advice
Practical guides for buying a watch with this caliber on the pre-owned market: