British brand Bremont has released 3 limited edition GMT chronographs to mark the centenary year of the Royal Air Force next year. And like they did with previous Limited Edition watches, the brand will donate a percentage of the Bremont 1918 Limited Edition’s proceeds to a charity, in this case the Royal Air Forces Association (RAFA), which has supported current and former RAF personnel for almost 90 years.

75 pieces each in white gold and rose gold

The 43 mm watch case, available in white gold, rose gold and stainless steel, features the brand’s trademark Trip-Tick construction and has a thickness of 17.2 mm and is fitted with an anti-reflective, scratch resistant sapphire crystal. All three cases feature an exhibition caseback and the case is water-resistant to 10 ATM or 100 meters.

The dials on all three models incorporate subtle design features from the traditional RAF-issue sector clock. The most notable characteristic of this new chronograph is an am/pm indicator that depicts the legendary Supermarine Spitfire dogfighting in the Battle of Britain during the day, and then the iconic Avro Lancaster bomber flying on a night mission lit up by search-lights. This is also the first time that a telemeter scale has been used on the dial of a Bremont watch.

The AM-PM indicator is unique to the Bremont 1918

The two gold variants feature applied indexes on opaline dials (the white gold case uses a two-toned blue dial while the rose gold version comes in black) and solid gold hands to indicate time. The stainless steel version uses a white dial with printed indexes and blued steel hands.

The Broad Arrow (a stylized representation of a metal arrowhead) – a nod to the marking on British military-issued watches – is seen below the am/pm indicator. The two-register layout uses a central chronograph seconds hand, a running seconds counter at 9 and a 30-minute counter at 3. A date window is placed between 4 and 5 and the watch has a central GMT hand.

The stainless steel version is limited to 275 pieces

The watch is powered by a COSC-certified BE-16AE movement, a Vajoux 7750 that has been heavily modified by Bremont. The oscillating weight of this self-winding movement, which is inspired by the shape of an aircraft propeller, is truly special. It incorporates parts from three iconic RAF planes - a Bristol Blenheim, a Supermarine Spitfire and a Hawker Hurricane that flew in the Battle of Britain in 1940. Parts from the three aircraft form the propeller blade and are complemented by a veneer of original wood from a 1917 SE5a (that is part of the Shuttleworth Collection) which can be found at its center.

The rotor uses parts from iconic RAF planes

All three variants will be produced in limited numbers – 275 pieces in stainless steel (£8,495.00), 75 each in white gold (£16,995.00) and rose gold (£15,995.00). Each version will have an alligator strap. The watches will be delivered later this year.