Beschreibung:

Longines. A very fine and rare stainless steel Siderograph double split seconds chronograph deck watch Signed Longines, Aero-N. No. 6425248, circa 1939 With Marine Nationale cal. 21.29, nickel-finished jewelled lever movement, the two tone silvered dial with inner black ring calibrated for 360 degrees with black hand doing a complete rotation in 23 hours and 56 minutes, inner red ring calibrated for degrees, outer blue ring calibrated for 300 divisions, up and down indicator, in circular glazed aluminium case suspended from the aluminium frame with five anti-vibration springs, the springs protecting the movement from deregulation by the vibrations of the aircraft's or zeppelin's engine, all screwed into the wooden transportation box with glazed cover, dial and movement signed 94 mm. diam.