Unless someone has rechambered or fitted a new cylinder, it is in .38 Smith and Wesson or the british terminology .38-200 or .380 revolver. All the same cartridge.
Defiantly not a model 10, "Victory" model was more of a made up term than anything else and is not a model number of any kind. The Model would be "Military and Police". There were basically 2 versions the first Blued normally called the M & P and the second the Victory normally parkerized. I have seen variants of both done in both finishes.
Smith has had a Military and Police model in their line up for many years even now with the M & P semi auto pistol and the M & P AR-15 variant.
These are wonderful little revolvers to shoot and this K framed gem eventually became the Model 10 in about 1947 or so.
Scott