Hi! I have found the Hamilton materials sent out to watchmakers and dealers extremely helpful. Now I am looking for Hamilton Technical Data & Bulletins and Service Bulletins for Grades 910/914/900/920, 992 and 770, original (cash by Paypal please) or trade for good resolution .jpg or .pdf format. What I have (.pdf) is CLD case, Grades 747 and 748, Elinvar, Improved Friction Jeweling, 12S Motor Barrel, Fitting Balance Staffs + Jewels, Balance Truing, Balance Poising, Balance Staffs, Floating Stud, Temperature Compensation, Hairspring Rust, Grades 980-982M, Grades 917 and 921, Grade 911, Regulation, Jewel Pin Locations, Grade 992B, Balance Staff Replacement and Cleaning & Oiling.
THANK YOU!