Lot 520

Longines, Movement No. 4897371 und 4897377, Cal. 21.29, 76 mm, circa 1926
A rare set of navigation watches with 24 hour dial and 36 h power reserve indication housed in a single wooden box, developed for astro navigation, intended for zeppelines or planes
Case: chromium-plated. Dial: silvered. Movm.: 2/3 plate movement, large screw compensation balance, hack feature.