Unusual Nautical Item- Circa 1987 Lifeboat Hydrostatic Release device. Designed to release a lifeboat container when a boat sinks to a depth of 0 to 4 meters. Manufactured by Raftgo Hendry MFG Co. Came across this on my travels, never seen another one. Seems to be in working order but I am selling it as a non working collectible. Made out of stainless steel.