V prefix means victory model. WW2 S&W production revolver for military use. Usually rought finish and parkerised. Some early ones might be blued. It is a four inch M&P(pre model 10 type) and they used to sell cheap. Now a really nice one brings alot more money than I would pay for one. I once got one for 75$ but now they might be 4-500 for a really nice one. If you are willing to pay what they are asking. U.S. Navy markings not seen as often, I don't think. Some Navy ones were used by pilots in shoulder holsters during the war. Some were in 38 S&W caliber for the British. Lot of them ended up back in the US with ugly black paint over the worn out finish. I have one and it is a basket case, I think. If it were refinished it would still be a very worn loose gun. And in an unpopular caliber. I should at least remove the paint someday and see what the markings are for British service besides the US markings. then toss it in the river.