Hour Angle Watch - Lindbergh An attractive "hour angle" aviator's navigation watch<br>

Gehäuse
18 K gold, hinged push back with Longines logo, glazed movement, bidirectional rotating bezel with angle horaire.|Very good, slightly worn.

Zifferblatt
Enamel/silvered.|Very good.

Werk
Automatic.|Very good, capable of running, cleaning recommended.

WERKNR:58040123

reference:989.5216

caliber:L.989.2

caseId:25199061

dimension:38 mm

circa:1988

country:Switzerland

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In the early years of aviation between 1920 and 1930 the majority of aviators wore watches created by Longines. The main reason for this was Longines' advantage in innovation, their most notable piece at the time being the Hour Angle watch.As Earth makes one rotation of 360 degrees, a 12-hour dial is a useful tool for dividing up that distance over time. With the inner rotating bezel the aviator could use the hands of the watch to pinpoint his location accurately.