Chauchat Machine Rifle
A mechanical diagram of 1915 Chauchat Machine—rifle, also known as Rifle C.S.R.G., illustrating the mechanism. The rifle weighs 19 lb. and 45 in. long; and was commissioned by Col. Chauchat from France.
Encyclopaedia Britannica (12th ed., vol. 32) (New York, NY: The Encyclopaedia Britannica Company, 1922)
Courtesy the private collection of Roy Winkelman