Antique French aviation altimeter, 3¾” silvered brass dial with twin concentric scales, the rotating outer with a range from 0–4000 metres with stations at 200 metre intervals and a resolution of 10 metres, the last 1500 metres read on a part-second revolution, 3500m and 4000m marked in red. The inner scale graduated from 56-78 cm of mercury. The upper centre dial marked “Naudet & Cie,” with “PHNB” logo and “Paris.” The lower portion with serial no. “768” and “Aviation Militaire.” Broad blued-steel pointer set beneath bevelled glass. The very high quality single capsule movement constructed in brass with a full range of adjustment, Naudet pattern compensation. The drum pattern case with top mounted stem and altitude ring adjustment crown. The rear with compensation screw set at 4 o’clock.
Originally supplied in a leather case with suspension rings, these aviators’ instruments are very seldom seen. This one has survived in remarkably good condition. The dial with minor marks, the glass with light abrasions, the case heavily patinated. The instrument which has been inspected and serviced is in good working order. Very much a collector’s piece.
Dimensions: 4″ diameter x 1½” deep
Stock No: BA0325
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