This Colt Model 1877 Lightning DA revolver was manufactured in 1886 with six-inch ejectorless barrel. The revolver has New York style scroll engraving on a punch-dot background with zig-zag borders. The engraving coverage is about equal to Colt "B" engraving. The revolver has a full nickel-plated finish and is fitted with two-piece, bird's head grips. The top of the barrel is roll-stamped with the two-line Hartford address. The left side of the barrel originally was acid etched with the oval panel caliber marking. The Colt patent markings on the left side of the frame are partly covered by scrollwork. The full serial number, "55507", is stamped on the bottom of the frame, trigger guard and back strap. The partial serial number "507" is stamped on the bottom of the barrel beneath the cylinder pin. All of the visible serial numbers match. The assembly number "15" is stamped on the inside of the loading gate. A completed Colt Model 1877 D.A. Revolver Survey is included with the revolver.