I have a nice blued 3rd model 38 safety hammerless that is stamped USX on the right side just below the S&W trademark. The serial number is also stamped above the trademark in the right side. This Smith is in very good shape and carries about 90% of the original finish. This revolver came from the family of the U.S. Express Co. agent that was serving from approx 1907 - 1912, here in Oklahoma. I hope someone can tell us the date of manufacture-purchase and approx value. Thanks Henri