This is a fine example of a seldom encountered Colt Single Action Army revolver chambered for the scarce .44 rimfire cartridge. Colt manufactured approximately 1,800 .44 rimfire Single Action revolvers between 1875 and 1880. These revolvers had their own serial number range and had a distinctive hammer with rimfire firing pin secured by two pins and a rectangular hammer slot in the frame. The ejector rod has the correct "bullseye" head and the hammer has bordered knurling on the spur. This left shoulder of the trigger guard is stamped "44 CAL", and "44" is stamped on the underside of the barrel ahead of the cylinder pin. The top of the barrel is roll-stamped with the first style block address utilized on .44 rimfire revolvers above serial number 400. The left side of the frame is roll-stamped with the Colt 1871/1872 patent dates in two lines. A Colt "C" sub-inspection mark is stamped in the hammer well, on the rear face of the cylinder and on the barrel behind the ejector housing stud. The full serial number "1144" is stamped on the bottom of the frame, trigger, and back strap, side of the cylinder and bottom of the barrel beneath the ejector housing. The frame, trigger guard, back strap, and cylinder serial numbers are identical. The barrel serial numbers are smaller and use a different font. All of the serial numbers match. The assembly number "46" is stamped on the inside of the loading gate. The revolver has a nickel-plated finish with casehardened hammer and blued trigger. The one-piece walnut grips are varnished. The included factory letter (photocopy) lists this revolver by serial number as a "no record gun."