The closest SN on my list to yours is V305xx which shipped in 7/42. If there is nothing stamped on the topstrap, it is very likely not a military revolver. As previously said, if it has a 4" barrel, the caliber stamping on the barrel should be "38 S&W Special CTG" The original finish was phosphate (like Parkerizing), not blued. Original grips would have been smooth wood. The plastic grips on it are called Franzite. They were popular during the 1950s. If you remove them, you may see "Franzite" molded on the inside.