Technical Information and FAQ

     Jeff Sexton


Hamilton Balance Staffs, New and Old Part Numbers
Staff numbers, watches size and description

 Hamilton Balance Staffs - Technical Data (T. D. 111)


Until 1915. Elgin publish model and class information about is movements.  Later products were designated by grade only.  There's some more information about this here...

This catalog for retail dealers includes Elgin watch prices, models and other information

 Portfolio of Watch Selling 
Information for Elgin retailers, mid-1950s

Elgin Part Numbers
These are numbers The Elgin National Watch Company used for types of watch parts. They appear on parts packaging along with the specific factory numbers.

General Information 

 Look up and identify American balance staffs
Identify unknown balance staffs by their dimensions

 How to Determine the Size of a Watch

 London Date Hallmarks 


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