Bluenkight wrote:Does this help?

Yes, that is a better view, but I meant the other key, as this one was already visible. If these are both no.3 there shouldn't be any difference between them, except for the bitting, which might explain the trouble you are having. I sometimes have a hard time with masters too. I have spent a lot of time learning about locks, but it hasn't seemed to really improve my picking ability. I haven't seen a no.3 that has the white lines on the bumper, and the cutaway part where the rivets are. Is it a new one? The cutout parts remind of the new magnums.