Chuck you are right but you are wrong also. There are three versions of the 282 crane. 1954 = 282-6 clutch shaft with 282-10 metal worm gear. Late 1955 = 282-123 clutch shaft with 282-121 plastic worm gear. 1956 282R= 282-131clutch shaft with 282-121 plastic worm gear. Check the parts list not the pictures if you don't believe me.