Colt manufactured only approximately 15,500 of these revolvers from 1847 to 1850. This revolver was manufactured in 1848. The top of the barrel is absent of any markings, the left side of the frame is marked "COLTS/PATENT". The matching serial number is marked on the barrel, cylinder, frame, trigger guard, back strap, with "16" visible on the cylinder pin and mis-matched wedge "219". "COLTS/PATENT" is also marked on the cylinder as well as a very faint Texas Ranger/Indian scene. The cylinder has the round stops, the trigger guard is the squareback variation, the barrel and cylinder were finished blue, the frame and hammer casehardened and the trigger guard and back strap silver plated. Fitted with a one-piece varnished walnut grip. The revolver comes with an x-ray of the barrel showing no welded fill-in.