The Altitude Chronograph GMT marks the next evolution in Bremont’s aviation watchmaking — combining the exceptional durability of the MB series with the versatile functionality of both a chronograph and GMT complication.
Encased in a 42mm Trip-Tick® case crafted from ultra-tough 904L stainless steel and finished with a black DLC-coated centre barrel, this timepiece is engineered to perform under the most demanding conditions. At its heart lies the chronometer-certified BC781 automatic movement, offering a 62-hour power reserve, quick-set date, hacking seconds, and an independently adjustable GMT hand for tracking a second time zone.
For added resilience, the movement is suspended within a flexible rubber mount to absorb shocks and reduce impact. The open case back reveals intricate movement finishing in gunmetal grey with Geneva Stripes—while maintaining anti-magnetic protection through a soft iron inner shield based on Faraday cage technology.
Inspired by cockpit instrumentation, the dial features applied Super-LumiNova® numerals and markers for optimal visibility, along with recessed chronograph subdials. A red-tipped GMT hand sweeps across a 24-hour day/night scale, and the rotating seconds subdial at 9 o’clock is cleverly styled as a tri-blade propeller—an homage to Bremont’s military design roots.
Completing the timepiece is a newly developed 904L stainless steel bracelet with a brushed finish. Designed with quick-release functionality and curved bars for improved flexibility, it ensures a seamless fit and exceptional wearing comfort.
The Altitude Chronograph GMT is more than a pilot’s tool—it’s a symbol of precision, performance, and enduring craftsmanship.
Functions
Central GMT/Hour/Minute
Chronograph centre sweep seconds hand
Small seconds counter at 9 O'clock
Chronograph small counters with 30 minutes counter at 12 O'clock and 12 Hour counter at 6 O'clock
Date at 6 O'clock
Movement
Calibre: BC781AC movement
No of Jewels: 25 Jewels
Glucydur balance wheel
Anachron balance spring
Nivaflex mainspring
Frequency: 28,800bph (4Hz)
Power reserve: 62-hour
Decorated Bremont rotor
Case specifications
Satin & polished 904L stainless steel Trip-Tick case construction with Brushed Black DLC barrel
Inner anti-magnetic movement protection ring
Protective anti-shock movement mount
Case Diameter: 42mm
Case Length: 49.62mm
Case Depth: 14.7mm
Lug width: 22mm
Case back: Decorated 904L stainless steel open case back
Dial and Hands specifications
Brushed Silver Galvanic metal dial including: Numerals and Indexes filled with white Super-LumiNova® (Blue emission)
Grey and Silver Day and Night 24 hour dial ring
Brushed sub-dial at 9 O'clock, 12 and 6 O'clock Sub-dials with fine CD Lines
Gloss Black Hour and Minute hands, filled with white Super-LumiNova® (Blue emission)
Gloss Black chronograph sweeping seconds hand
Red tipped GMT hand, filled with white Super-LumiNova® (Blue emission)
Gloss Black 12 and 6 O'clock sub dial hands
Gloss Black Propeller design Running Seconds hand at 9 O'clock with white Super-LumiNova® tips
Crystal
Glass Box anti-reflective sapphire crystal
Water Resistance
10 ATM, 100 metres
Strap
Quick release 904L stainless steel bracelet
Weight
88.8g (watch head only)
Rating & Certification
Chronometer rated to ISO 3159 standard
