Tudor
Black Bay GMT
79730N
Tudor's in-house GMT in classic Black Bay form — built for two time zones.
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Overview
The Tudor Black Bay GMT ref. 79730N is a 41 mm stainless steel GMT-wristwatch powered by the manufacture Calibre MT5652, introduced in 2018 as part of the long-running Black Bay collection. Its black dial and characteristic bi-directional 24-hour bezel place it firmly in the heritage-inflected aesthetic that defines the Black Bay line. The reference represents Tudor's commitment to in-house movement development within an accessible, tool-watch idiom.
History
The Black Bay GMT arrived in 2018, marking a significant milestone for Tudor as one of the first references in the line to offer a GMT complication driven by an entirely in-house movement. The Calibre MT5652 was developed with COSC-certified precision and a 70-hour power reserve, reflecting the broader investment Tudor had made in manufacture movements during the preceding years. The Black Bay collection itself draws on Tudor's mid-twentieth-century diving-watch heritage, and the GMT variant extended that design language into the realm of travel and dual-time complications. The 79730N has remained in production, cementing its place as a cornerstone of the modern Tudor catalogue.
Notable points
- Calibre MT5652 is an in-house Tudor manufacture movement, COSC-certified and offering approximately 70 hours of power reserve.
- The 41 mm stainless steel case follows the Black Bay family's characteristic proportions, including the signature "big crown" and domed crystal.
- A bidirectional 24-hour graduated bezel allows the wearer to track a second time zone independently of the local-time hands.
- The black dial continues a sober, legible aesthetic consistent with the tool-watch origins of the Black Bay line.
- Introduced in 2018, the 79730N has remained in continuous production, making it one of Tudor's most enduring in-house GMT references.
Specifications
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