American pocket and wrist watch balance staff interchangeability list
By: by George E. Townsend, Oran S. Emrich, Roy Ehrhardt.
Contributors: Emrich, Oran S.; Ehrhardt, Roy.
Edition: 1st ed. 
Publisher: Heart of American Press
Published: 1984
Place of publication: Kansas City, Mo
Language: eng
Number of pages: 36
Subjects: Pocket watches -- United States.; Wrist watches -- United States.; Clocks and watches -- Repairing -- United States.
Other titles: Balance staff interchangeability list.