All TT Reps, from late 1928 to 1934 had the duplex type frame. This one looks like a 1931 to 1933 Flying Squirrel Tourer. Short-stroke engine with Hemmings Paramount nine-stud aftermarket detachable head conversion. NOTHING like a Rep…. It may say RZ prefix to the engine number, but the Hemmings Paramount conversion was ONLY for shortstroke engines…..