History of Longines
Preceded by an Essay on the Agassiz Comptoir
1947, 75 pages, ill
Longines master navigation watch, 1941.
Presumably the Hamilton Watch Company could not make enough 4992B navigation watches for the US forces and some watches had to be imported.
This book (which includes 8 portraits from the original) is an excellent history of the Longines Watch Company.
It is provided as an Adobe Acrobat PDF file:
Illustration: Longines master navigation watch, 1941.
Presumably the Hamilton Watch Company could not make enough 4992B navigation watches for the US forces and some watches had to be imported.