Bremont Altitude Perpetual Calendar GMT Monopusher
British watch brand Bremont presents the Altitude Perpetual Calendar GMT Monopusher, a limited edition housing a complication module exclusively devised by Agenhor, the celebrated Geneva atelier.
Limited to 50 pieces, this timepiece boasts an ingeniously efficient display, which presents complex information with exceptional readability, while preserving the distinctive design language and durability of the Altitude range.
The 42mm case, made of lightweight grade 2 titanium, features the collection’s signature three-piece Trip-Tick case construction.
For the GMT, a domed disc at 12 o’clock with a globe decoration – echoing that previously seen in 2024’s Terra Nova Dual-Time Tourbillon – provides the second time-zone indication: as the globe turns, an arrow indicates the home time against a 24-hour index that’s divided into day and night sections. Adjusting this is straightforward: a mono-pusher integrated into the crown allows the wearer to advance the arrow in one-hour increments. A corrector at 2 o’clock allows you to set the date, whilst a corrector positioned at 4 o’clock allows you to set the leap year and month.
At 9 o’clock, running seconds is displayed with a two-blade ‘propeller’ hand, on a sector-style subdial with Bremont’s Wayfinder logo at its centre.
The perpetual calendar’s indications – date, month and position in the leap year cycle – are presented on the other two subdials, at 3 o’clock and 6 o’clock respectively.
At 6 o’clock, a pointer indicates the date on a circumferential index. At the 3 o’clock position, a beautifully intuitive month/year indication uses a four-blade propeller style hand, with three white-tipped blades and one red-tipped blade.
The subdial is divided into four sectors, each representing a year in the leap cycle, while the first sector also includes markings for the 12 months. The red-tipped blade denotes the current position in the four-year cycle, while the month is shown by whichever of the four blades is passing through the first sector at any given time. The propeller’s movement is imperceptible, advancing in 172 micro-jumps across the four-year cycle – a shift of just under 2.1 degrees every eight days.
To realise this dynamic and highly unusual combination, Bremont worked with Agenhor and Sellita. The watch is powered by a manually wound base calibre from Sellita, the AMT6900. The baseplate and bridges, designed with graceful symmetry, display a ‘soleillage courbe’ – or curved sunray – finish, contrasting with polished screw-heads and wheels that combine snailed and polished finishing.
The Bremont ‘Wayfinder’ logo is laser engraved on the ratchet wheel. The entire mechanism, consisting of both the base movement and the complication module, stands at just 6.8mm thick, keeping the entire watch to a highly wearable 12.65mm thick. Finally, the movement features a Côte de Genève finish and an engraved Bremont logo with a ruthenium treatment.
Thanks to its fine engineering, the Altitude Perpetual Calendar GMT Mono-pusher delivers a power reserve of 50 hours.
The dial is in ‘Air Force Blue’ – also known in Italy as ‘blu aviazione’ – a richly nuanced shade long associated with aviation, and inspired by the blue-grey uniforms of Britain’s Royal Air Force.
This has been given a smart vertically brushed finish, reminiscent of mid-Century vintage watches, which provides a rich contrast with the black tonality of the chapter ring and date sub-dial. The Air Force Blue is repeated in the brushed PVD coating of the centre barrel of the Trip-Tick case, standing out from the titanium top and bottom sections.
Along with the crown-based mono-pusher for adjusting the GMT, recessed correctors at 2 and 4 o’clock allow for effortless adjustments of the calendar functions while maintaining a streamlined case profile, without the need for more complex intervention.
With only 50 pieces available, the Altitude Perpetual Calendar GMT is priced at £33,500.
Model: Bremont Altitude Perpetual Calendar GMT Monopusher Limited Edition
Movement
Calibre BHC9192-MH
Mechanical hand-wound movement
19 Jewels
Glucydur balance wheel
-6 /+6 seconds accuracy
50-hour power reserve
Functions
Central Hour/Minute
Running small Seconds at 9 O’clock
24hr GMT Globe at 12 O’clock
Date sub-hand at 6 O’clock
Month/Leap year sub-hand at 3 O’clock
Case
Satin and polished two-piece Titanium case
Push-in mono-pusher crown
Month & Year correctors at 2 and 4 o’clock
Case Diameter: 42mm
Case Length: 49.62 mm
Case Depth: 12.65mm
Lug width: 22mm
Crystal: Glass box anti-reflective, scratch resistant sapphire crystal
Water resistance: 10 ATM, 100 metres
Dial
Brushed Blue Galvanic metal dial including applied Numerals and Indexes filled with white Super-LumiNova® (Blue emission)
GMT Globe with Day and Night 24 hour sub-dial ring at 12 O’clock
Blue Satin and CD lines on Sub-dial at 9 and 3 O’clock
CD Lines and Black Sub-dial ring on Subdial at 6 O’clock
Strap
Quick release titanium bracelet & Quick release blue patina leather strap.
Edition
Limited edition of 50 pieces
