Colt Single Action Army Revolver (A Pocket Chronology) Larry Hacker GS18439 US$ 6.95 Pref. Cust. Discount 15% Pocket size, this little book contains dates of manufacture by serial numbers. Model design variations, codes, barrel markings and principle military markings. 3 1/2 X 5 3/4, softcover, illus, 23pp.