Introduced in 1945. Blade and notch sights, heavy barrel and serrated slide with model markings on the left side. The left side of the frame is marked "MADE IN U.S.A./ THE HIGH STANDARD MFG. CO/ NEW HAVEN, CONN./ PATENT PENDING/ .22 CAL./ LONG RIFLE", and the right "PROPERTY OF/ U.S." over the ordnance cartouche. "PROPERTY OF U.S.A." on the barrel. Serrated trigger, checkered grips.