Breitling. A rare gold automatic chronograph pilot’s watch with 10-minute final glide calculator, Ref. H36030.1, Spatiographe, Montbrillant, No. 0092, circa 2000.
Movement: cal. 36, automatic, 38 jewels.
Dial: silvered, applied baton indexes, subsidiary dials for constant seconds and 3-hour register, aperture for 10-minute final glide calculator.
Case: 18ct gold, snap-on back, revolving reeded slide-rule bezel, no. 0092, 18ct gold buckle.
Signed: case, dial, movement and buckle.
Dimensions: diameter 41mm.
Accessories: presentation case.
£3,000-£5,000

As a glider pilot of a fixed wing aircraft, the owner of this watch used his Breitling Spatiographe wristwatch frequently on his flights to calculate the glide ratio to make it to the finish point of a glide.