Unusual Factory Deviations On Colt SAA & Bisley Revolvers Colonel Robert D. Whittington III Ordnance Corps U.S. Army WSO-28-9 US$ 15.00 Pref. Cust. Discount 0% A monograph containing unusual deviations of the Colt SAA & Bisley revolvers. 8 1/2 X 11 photocopied pamphlet, stapled top left corner, 15pp.