10 Gauge Blank. 11.75" barrel length. SN: 620E. Blued metal finish with black enamel painted carriage with twin steel wheels retained by cotter pins. Single shot breechloading signal gun with manually operated falling breech. Top of the barrel is marked NOT FOR BALL forward of the trunnions with two-line maker mark and patents behind reading MANUFACTURED BY THE WINCHESTER REPEATING ARMS CO./NEW HAVEN. CONN. U.S.A. PATENTED AUGUST 20. 1901. followed by 10 GA. marking. Carriage retains cast marks reading W.R.A. CO./TRADE MARK/REGISTERED IN U.S.A.