WWII submarine barometer-manometer

WWII submarine barometer-manometer. These ranged up to 37 inches of mercury, mainly because BEFORE a dive, the interior of the sub was slightly pressurized, to ensure that valves, hatches, and of course any bullet holes were sealed off. A leak in a diving Submarine could be fatal.These were mounted prominently BETWEEN the two"PLANESMANS" stations, as these crewmembers could cancel a dive if this instrument did not show a pressure build up in the hull.

T B Winter Of Newcastle Pocket Barometer

Antique T B Winter Newcastle gilt metal cased pocket barometer, the white enamelled dial with black number details and black pointer hand, the front bears the makers name “T B Winter Newcastle”, the dial measures approx 4.7cm wide.

RIGGS & BROTHER Philadelphia marine barometer

Antique RIGGS & BROTHER Philadelphia marine barometer. This absolutely beautiful marine comes as pictured in the original case. It seems to be in fine condition. Cira 1860 early and interesting American instrument.

This marine barometer is for sale on Ebay Item number:260220222229.