A 6 bolt Divers Helmet,
by Siebe Gorman, London. Numbered 18145 on the faceplate and corselet. The bonnet with screw faceplate and two barred side windows, air inlet and exhaust, telephone socket, locking pin and manual spitcock. Fitted with suspension rings and rope hooks. The interior tinned, with side microphone and chin switch. The corselet with weight nipples front and back and maker's plaque, no brailles present. 18in (46cm)high.