First: After working on the bolt work or lock don't close the door before testing the combination and bolt work at least three times.
It is a Yale 063 1/2 with a bronze case, as far as I can see. The dialling sequence is 5R to 1st number, 4L to 2nd number, 3R to 3rd number, 2L to 4th number, R to stop. The wheels are mesh change. A more modern lock with mesh change wheels is this Mosler:
https://www.youtube.com/watch?v=x6L_jQJRQXQ So you can disassemble the wheel pack and look at the wheels, but don't mix up the order of parts when you reassemble it. Or you look at the location where the fence (this V shaped part) touches the wheel pack and do the dial sequence and stop every time the gate/gap in the respective wheel is there. The wheel with the 4th number is most near to the dial.
