Ok, I just inheited what I think is a model 10. Serial no. 4626xx, four screw, half moon front sight, 6-shot, mushoom head ejector and "made in USA" on frame. Right side of barrel says .38 S&W Special CTG and top of barel has patent dates for Feb 6 06, Sept 14 09, and Dec 29 14. I was told that the finish was once nickel, and the factoy stocks have since been changed to pearl.