There are several models of Colt revolvers which have cylinders that revolve to the left: Colt DA Navy Revolver, New DA Army and Navy Revolver and the DA Marine Corps Revovler (different grip shape than New Army/Navy). What we need are the markings on the barrel to help positively identify it.
On the first (Colt DA Navy Revolver, aka Model 1889), the markings are:
COLT'S PT. F.A. MFG. CO. HARTFORD CT. U.S.A.
PATENTED AUG. 5th 1884. NOVEMBER 6th 1888
COLT D.A.38
The 6" barrel was the Navy model of this gun and 3", 4 1/2" Civilian models. There was also a civie 6" too.
The succeeding models (New DA Army and Navy, model 1892, 1894, 1895, 1896, 1901 and 1903) were marked accordingly:
same as 1889 except as production progressed the following were added:
MAR. 5 95 and APR 9, 1901
Additional markings may be found on those actually issued in service. These were found on the butt and stock. A navy could be marked, "U.S.N. (anchor) 38 DA - No. 2311 WWK - 1889" and the army as "US ARMY MODEL 1896 140 428 LW".
The Marine Corps revolver was marked on the barrel as:
COLT'S PT. F.A. MFG. CO. HARTFORD CT. U.S.A.
PATENTED AUG. 5 1884, NOV. 6, 88, MAR.5, 95
So, tell us more about your gun (barrel length, markings).
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