It should have at least a caliber marking (38 S&W Special CTG) on the barrel, unless it has been polished off. The lack of any other markings suggests it's one of the wartime DSC contract revolvers made for domestic use. The gun itself has no collector value due to its poor condition, but might be worth a couple of hundred as a shooter. However, the grips, if they are Tuskoid, could have substantial value. You may want to remove them and take some good detailed close-up pictures of both inner and outer surfaces for posting. Tuskoid grips are an arcane area of S&W collectibles, and the only ones I have seen have been the later Magna style. Those on yours are of the grip panel style used by S&W during the 1920s, and I have no idea if Tuskoids even existed then.