Here’s a unique item.
https://fortcollins.craigslist.org/pts/d/platteville-rockford-pto-willys-pta-5852/7235780013.html
“Good Working Rockford PTO Model # PTA 5852
Was on a Willys L head engine running a pump . I believe it fits all early Willys flathead and L heads along with continental engines and a bunch of other industrial 4 and 6 cylinder engines. Clutches are like new ring gears are really nice. Good to run sawmill generator pumps etc.”