.56 caliber. 30.5" two-stage wedge retained octagon-to-round barrel with under rib. SN: NSN. Blued and color casehardened finish, iron mountings, checkered walnut pistol-grip half-stock with checkered forend and German silver nose cap.  Lightly engraved lock mark "HUDSON'S BAY COMPANY" and "MADE IN ENGLAND". Top flat of barrel engraved "IMPERIAL No 1". The Imperial brand was a line of inexpensive shotguns and fowlers introduced by the Hudson's Bay Company at the turn of the century, which was produced through the mid-1920s. Includes what appears to be an original brass tipped wood ramrod.