Not an expert or RKI but I have one with similar markings.
M&P Victory model. Made for Australia during WWII. The upside down P with the V were typical of them. The hole in the butt is for an lanyard loop.
You need a description of any other markings.
http://smith-wessonforum.com/s-w-han...-timeline.html
http://smith-wessonforum.com/s-w-hand-ejectors-1896-1961/209224-australian-victory-model.html