Another good softcover book that I did not see mentioned is "Monograph IV The Swiss Variations 1897 - 1947" by Fred A. Datig, I think the last print was 1992.
Also the german "Pistolen und Revolver der Schweiz seit 1720" by Reinhart and Meier is good value for the money.
Guisan. 
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Fight to your last cartridge, then fight with your bayonets.
No surrender. Fight to the death.
--Gen. Henri Guisan, Switzerland, July '40
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