American Movement Archive & Calibers
The American Watch Guild movement archive documents historical specifications, jewel counts, escapement types, balance designs, and dimensions for classic American horological manufacturers.
Benrus
16 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
Bulova
20 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
E. Howard & Co.
3 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
Gruen
20 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
Hampden
2 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
Illinois
8 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
Waltham
20 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
Wittnauer
15 movement calibers cataloged with technical specifications, jewels, beat rates, and dimensions.
Looking for Historic Railroad Pocket Watch Grades?
Browse full factory documentation and production records for precision railroad timepieces:
Elgin Archive Hamilton Archive Illinois Archive Waltham Archive