The Altitude Chronograph GMT is the ultimate evolution of Bremont’s aviation tool watch — combining the proven resilience of the MB series with the added functionality of a chronograph and GMT complication.
Housed in a 42mm Trip-Tick case made from ultra-rugged 904L stainless steel, with a black DLC-coated centre barrel, the watch has been engineered to withstand the harshest conditions. Inside, the chronometer-rated BC781 movement delivers a 62-hour power reserve and features a quick-set date, hacking seconds, and independent GMT hand.
Beneath the surface, the automatic movement is suspended within a flexible rubber mount to absorb shocks and minimise impacts. The Altitude Chronograph GMT has an open case-back, revealing the movement’s fine finishing in gunmetal grey with Geneva Stripes. The open case-back retains the anti-magnetic shielding, which is provided by a soft iron ring around the movement, based on Faraday Cage principles.
The dial design is clean, legible, and cockpit-inspired, with applied Super-LumiNova® numerals and indexes, and recessed chronograph subdials. A red-tipped GMT hand tracks a second time zone against a 24-hour day/night scale, while the rotating seconds subdial at 9 o’clock takes the form of a tri-blade propeller — a nod to a Bremont military project.
For the Altitude Chronograph GMT, Bremont introduces a new bracelet design, crafted in brushed 904L stainless steel. Featuring quick-release functionality and engineered for maximum flexibility, it is secured with curved bars that enable smooth articulation and exceptional comfort.
Automatic, 42mm, 904L Stainless Steel
The Altitude Chronograph GMT is the ultimate pilot's tool watch — a mission-ready timepiece built for exploration, travel, and demanding environments.
MOVEMENT
BC781AC movement
25 Jewels
Glucydur balance wheel
Anachron balance spring
Nivaflex mainspring
28,800bph (4Hz)
62-hour power reserve
Decorated Bremont rotor
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
CASE
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 & HANDS
Brushed Black Galvanic metal dial including:
Numerals and Indexes filled with white Super-LumiNova® (Blue emission).
Grey and Black 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 white chronograph sweeping seconds hand
Red tipped GMT hand, filled with white Super-LumiNova® (Blue emission)
Gloss White 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
1st Class Delivery applies to all non bulky items and is charged at £5.99. Postage for bulky items, (e.g. Tea Pots), is charged at £7.50.
First Class items are posted using Royal Mail or Parcel Force and will need to be signed for. A Special Delivery option is also available, (prices quoted at checkout).
If your order is placed before 3pm, it will be dispatched the same day. For UK deliveries, first class mail is usually delivered between 1 to 2 working days.
Order Cancellations and Returns
Our policy lasts 30 days. If 30 days have gone by since your purchase, unfortunately we can't offer you a refund or exchange.
To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.
Because of hygiene and public health reasons you cannot return your order for any jewellery which passes through the skin (such as earrings for pierced ears). Once we have dispatched these types of products to you, you cannot return them.
Additional non-returnable items:
To complete your return, we require a receipt or proof of purchase.
Please do not send your purchase back to the manufacturer.
We cannot be beaten on price. If you find the same item cheaper elsewhere, either online or in a store let us know and we will match or beat it.
Price Promise Terms and Conditions
We will match all of our UK competitors prices in store and online. The item must be brand new and identical. The item must be offered under the same terms. The price must be verifiable and genuine. The item must be in stock on our competitors site or in their store. We only price match new items, not delivery charges or services. This offer cannot be combined with any other offer.