WW2 U.S. Navy Brass/Bronze Ships Light Submarine Bulk Head Explosion Proof For Sale

WW2 U.S. Navy Brass/Bronze Ships Light Submarine Bulk Head Explosion Proof.
From a ww2 Sailors collection. I dont have any proof of what it came out of, just family speculation.
The it looks like it is a bronze alloy, The cage was exposed more so it oxidized differently than the base.
It has threads for a glass globe but that is missing. The curved reflector looks like solid tin.
7-1/2 inches tall.