Colt SAA & Bisley Production, 1873-1940 Common Calibers And Rare Variations Colonel Robert D. Whittington III Ordnance Corps U.S. Army WSO-30-9 US$ 10.00 Pref. Cust. Discount 0% A short report, that lists production quantities by caliber. 8 1/2 X 11 photocopied pamphlet, stapled top left corner, 4pp