Speaking of RCA, I was doing some filing in the gun room today and pull out my binder on the Savage 1920s.
In a letter dated March 24, 1993, to me from Roe S. Clark, Mr. Clark wrote that on December 17, 1920, Savage shipped three Model 1920 rifles in 250-3000 to The American Museum of Natural History 3rd Asiatic Expedition. The rifles were serial numbers 5575, 5742, and 5747. On January 19, 1922, a fourth Model 1920 rifle, this one in 300 Savage, was shipped to The American Museum of Natural History "Special Attention - Roy Chapman Andrews". This rifle was serial number 5648 and is likely the Model 1920 that RCA is holding in some pictures and in at least one Savage ammunition ad illustration.
