Looks like a 42 to 47 "60" Special, No beam mounts, 5/16 " shaft, 42 has 60 stamped on weld front of case. 45,46 has bulls eye in front weld spot. 47 large oval exhaust, 7/16 "intake tube, 10 cooling fins on bottom . Missing tank assy. & does not appear to have correct needle valve assy. MECCA price $100.00 to $125.00, E-bay $104.00 to $280.00 . Yours would probably be on lower end .