You are buying a CCKW DUKW G508 G501 TRANSMISSION Cap Main Drive Bearring, 2142306, 4926, and G501-0131550. Used for a Manual Transmission in the WWII Military CCKW/DUKW 6x6.   Some crud, rust, pitting and damage. Sold "as is".  Shipping is around 4 pounds at buyer's expense.