Marked on nameplate with serial #1234, A. Schrader's Son, Inc., Manufacturers of Divers Apparatus, Brooklyn, N.Y." In excellent condition with a nice patina. Three wingnuts are missing, but the helmet is otherwise complete.
One of the rear valves bears the U.S. Navy Anchor Inspection stamp, indicating that it was owned and used by the US Navy. Below the inspection mark, on the same valve is another instance of the maker's mark, SCHRADER USA.
