Thommen 6000 ft Classic Pocket ALTIMETER ANEROID BAROMETER Swiss made 19 Jewels

Thommen 6000 ft Classic Pocket ALTIMETER ANEROID BAROMETER Swiss made 19 Jewels (image 1/1)
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THOMMEN 6,000m Classic Black analogue altimeter / aneroid barometer in excellent clean working condition. No scratches or blemishes to case or screen Swiss made with 19 jewels. All analogue mechanical workings (no electronic parts reliant on batteries) Pressure graduated in mmHG (millimeters of mercury) from 553 - 790 mmHG height graduated from 0 - 6000 metres measures 6cm x 7 cm across comes with black leatherite carrying case Thommen altimeter works on simple mechanical operation similar to aneroid barometers with a small bellows that contracts or expands when you gain or loose height, that is why many of the best climbers use them today.The Thommen Altimeter is one of the finest quality altimeters you can buy. Thommen instruments were used by Sir Edmund Hillary on his 1953 Everest Expedition
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