With plated bezel, cover glass and index plastic base approx. 16 cm. diameter.
Aneroid Barometer Demonstration is with 100 mm. dial graduated 28 to 31 inch of mercury and 960 to 1060 millibars.
Air tight sealed all round, a pressure bulb is provided to force the movements for educative demonstration.
Eclosed in a transparent synthetic case for demonstration purposes.
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