A 12 bolt Diver's Helmet,
by Siebe Gorman. Numbered 19606 on the faceplate and corselet. The bonnet with screw faceplate and two barred side windows. Fitted with air inlet and exhaust, telephone socket, locking pin and manual spitcock. The interior with crown bayonet microphone socket and chin switch. The corselet with split brailles, weight nipples to the front and maker's plaque. Tinned all over. 18in (46cm)high.