The accompanying factory letter lists this Cavalry Model revolver a being delivered to the U.S. Government Inspector at the Colt plant on July 17, 1878 as part of a 150 unit shipment. In his accompanying letter, Colt SAA expert and author John Kopec speculates that the revolver may have been issued to a state militia unit as it remains in Cavalry Model configuration. Henry Nettleton's inspector initials "HN" are found on the trigger guard, frame, back strap, cylinder, barrel, hammer (left side) and bottom of grip. A "P" proof is stamped on the barrel and cylinder. The revolver has an all blue finish, the three-line patent dates marking followed by "US" on the left side of the frame, the one-line Hartford barrel address, and a grip with faint Greer and Nettleton cartouches with the date "1878". Matching serial numbers on the frame, trigger guard, back strap, cylinder, and barrel.