Details
A Siebe Gorman & Co. Ltd. 6-bolt Admiralty pattern diving helmet, numbered 17700 (matching), mid 20th-Century
the hand beaten bonnet with left mounted spitcock, air inlet with non-return valve and cap, telephone inlet (telephone mounting partially complete inside), adjustable exhaust valve, hinged securing pin, weight hooks, eyes and 'buzzer' switch inside; the corselet complete with weight pins front and back and makers plate, the helmet -- 20in. (50.5cm.)
See illustration
the hand beaten bonnet with left mounted spitcock, air inlet with non-return valve and cap, telephone inlet (telephone mounting partially complete inside), adjustable exhaust valve, hinged securing pin, weight hooks, eyes and 'buzzer' switch inside; the corselet complete with weight pins front and back and makers plate, the helmet -- 20in. (50.5cm.)
See illustration