I inherited this 1955 Model 10 this weekend. My grandpa bought it when he went on the police department in 1955. My dad was told sometime around 1958 that he was never to touch it, and so he didn't (for the most part, except to wipe it down with oil from time to time) through out his entire career on the same police department, nor in the almost 20 years since he retired. It looks like lead has found its way around the outside of the barrel. Been cleaning it for the past hour. Can't figure out how to get the lead out of the tiny area between the frame and the barrel. Too tight for pipe cleaners. Next idea was dental floss or kite string.