The 1/2 round top is too large for both the M frame and .32 double action. And the .38 Double action are the same as the 32 hand ejector and the .38 Perfected models. Might be for the Baby Russian .38 double action.I don't have a S&W .32 or .38 single action to compare but I don't think they are different than the double action. They may not be for a S&W or they're modified.
But I would post them in the Antique section of this forum.