You are buy a New Old Stock Braden Gearmatic M50-242A CLUTCH RIDER for Models AMS20 AHS20 MS30 HS30P MS50 HS50P p/n 11672.  This is half of the 61971* CLutch Rider Assembly, the other half is 11671, which I have also listed. Some warehouse crud, oxidation, and cosmetic damage. Sold "as is".  Shipping is 4 lbs.