Overall length 37.25"; barrel (bore) length 22"; caliber .44 rimfire. Markings: same as R. Ball & Co. sporting rifles; "No. 44" on top of frame near breech. Although firm evidence is elusive, approximately 1,000 of these carbines were manufactured in anticipation of a Canadian contract, which never came to fruition. Serial numbers are interspersed with sporting rifles, in 16,400 through 17,700 range. All are equipped with Merwin & Bray dual ignition block.