The bottom pistols has most of the same markings as the one you have, but has no US Property marks on it. Has Not English Made and all the proofs and on the backstrap, POL. LUN 76. it shipped in 1944. It also was reblued, but not very well, at some point in its post-war life.
The one above it is another BSR shipped in 1941 and it has the 1955 style British proofing on the barrel.
Top is a US Navy marked Victory shipped to Norfolk, VA in 1942. The other is a Victory shipped to the United States Maritime Commission in Hoboken, NJ in 1942. It has no markings on it at all.
I always find these pistols interesting.