COLT 1871-72 OPEN TOP MODEL RIMFIRE
.44 RF cal., 6 shot, 7 1/2 in. barrel, without frame top strap, blue metal with case hardened hammer, serial range 1-approx. 7,000, barrel address "ADDRESS COL. SAM COLT, NEW YORK, U.S. AMERICA", forerunner of the single action Ar...