The Blancpain Air Command Flyback Chronograph Limited Edition (Ref. AC01-1130-63A) is a highly collectible, 500-piece limited edition reissue originally launched by Blancpain in 2019. It serves as a faithful, modern tribute to one of the rarest military aviation timepieces in history—the legendary 1950s Air Command prototype designed for the United States Air Force, of which only a tiny handful were ever produced.

https://www.blancpain.com/en/air-command/air-command-ac01-1130-63a

Visible through an expansive sapphire crystal exhibition caseback is the sophisticated, in-house Blancpain Caliber F388B:

• High-Frequency Caliber: Operates at a rapid frequency of 5 Hz (36,000 vibrations per hour), enabling the chronograph to split intervals down to 1/10th of a second.

• Chronograph Mechanics: Driven by a smooth, tactile column-wheel system paired with a crisp vertical clutch. The vertical clutch prevents the chronograph seconds hand from jerking upon starting and allows it to run continuously without causing mechanical wear.

• Flyback Functionality: Allows the user to instantly stop, reset, and restart the chronograph timing sequence with a single press of the lower pusher.

• Propeller Rotor: Features a unique, open-worked 18k red gold oscillating weight shaped specifically like an airplane propeller.

• Power Reserve: Provides a steady 50-hour power reserve and utilizes an anti-magnetic silicon balance spring.

• Strap: Supplied on a 22mm patinated brown calf leather strap with contrast white stitching, finished with a classic stainless steel pin buckle.

• Water Resistance: Rated to 3 bar (30 meters / 100 feet). Keeping true to its pilot origins rather than dive watches, it is built to resist splashes rather than submersion.

• Rarity: Strictly limited to 500 individually numbered pieces worldwide. Because this execution sold out rapidly upon retail release, it is now exclusively sourced on the secondary and auction markets

• Case Architecture: Sturdy stainless steel case measuring 42.5mm in diameter and 13.77mm in thickness. It features a prominent lug-to-lug distance of 51.2mm and is topped by a vintage-style, box-type sapphire crystal.

• Bezel: A bi-directional, free-turning steel bezel equipped with a highly scratch-resistant black ceramic countdown insert.

• Dial Details: A striking sunburst black dial featuring a balanced bi-compax layout (a 30-minute totalizer at 3 o'clock and a 12-hour counter at 9 o'clock). It eliminates the date windows and running small seconds of modern counterparts to maintain historical purity.

• Vintage Lume: The syringe hands, Arabic numerals, and countdown scales are coated with "old radium" Super-LumiNova, producing a distinct ecru, faux-patina glow. 

• Outer Scale: A traditional tachymeter scale rings the perimeter of the dial, designed to gauge ground speed over a fixed distance.