A "sort of edikated" guess would be one of the series of double action Colts often collectively called the .38 caliber DA Army and Navy revolvers. These include the Model 1889 Navy, Colt New Army and Navy (government model designations Models 1892, 1894, 1895, 1896, 1901 and 1903), and the Marine Corps Model 1905. All were used by the armed forces and were also made for the civilian market, mostly in .38 Colt, though some were made in .41 Colt and .38 S&W.
These guns are identifiable by having a side swing cylinder with two sets of stop notches, a long grooved one to the rear and a small one further forward. The civilian ones have black hard rubber grips; the military ones have walnut grips.
HTH
Jim
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