I tried a search on this forum but no matches. I bought a S&W Model 36 3" barrell, square butt revolver for my daughter for her birthday last year and she brought it by today for me to clean and oil. I bought it used, in NRA Excelltent condition. I usually buy new guns but this one was so nice I snapped it up especially at the price I got it. I noticed today that it has a pinned barrell. This, I think would make it an older gun than I thought. The serial number is 7460XX. When the cylinder is open, on the frame is stamped Model 36. Can anyone give me an estimate when this gun was made?