Blancpain Air Command prototype chronograph, circa 1957–60s; 42 mm steel, bi‑directional countdown bezel, Valjoux 222 movement. Believed ~12 pieces made for U.S. Air Force trials.
Blancpain Air Command prototype chronograph, circa 1957–60s; 42 mm steel, bi‑directional countdown bezel, Valjoux 222 movement. Believed ~12 pieces made for U.S. Air Force trials.