I Have a 67 west coast hornet and it has the numbers stamped on it.....42 4968. They are stamped on the top left hand side. Right where the grip would go. Like Gary I had never seen them numbered before. When I was taking it apart to get them rechromed they looked a little different than what is on my other hornets not drastically different but different in the height and length. I almost thought they were the wrong ones until I seen the numbers stamped on them. I don't know how to post a pic since photobucket isn't an option. when I do I'll put in on here for you. ljm
Have original western bars from US '55 Golden Flash. No stamped numbers on it that I can see. Thing to note is the chrome/nickle under the handgrips didn't get polished. Might be nice to know if at a swap/jumble meet.