A good friend of mine in Canada sent me your book. I enjoyed it immensely as I am a watchmaker. I apprenticed at the age of 17 to a certified master who taught watchmaking at Bradley Horological in Peoria, IL., he later worked as a finisher in the Elgin watch factory where my mother also worked before WWII. I turned 64 this year. As a member of AWCI, I am familiar with the watches you refer to and do a lot of work on Rolex, Omega, etc… Keep writing. Great book. My wife also read it.