Wow, That’s a lot of useful information. THANKS.. As per your suggestions, I picked up the cd “Chicago School of Watchmaking”. Last night. I watch Bob’s video’s all the time, and each time I learn something. I don’t recall him explaining the sizing of jewels but I could of missed it. Sometimes I play the video while I ‘am working on a clock or watch and don’t catch everything. I think I ‘am 
getting hooked on watches. Although very similar to clocks, they are very different in a lot of ways. Have yet figured out how to time them but that’s another topic.. Again, THANK YOU SO MUCH for ALL the info,,
