They could be from the original equipment manufacturer or any number of aftermarket suppliers such as Weise
and AV Tractors
240 Batwing
AGCO Massey Ferguson Oil Seal part numbers - 195501M1
Replaces Case IH tractor fender part number 51179DX
New Differential Bearing Retainer Seal for IH Farmall A, B, BN, Super A, 100, 130, 140 Tractors, 71597C91, FREE SHIP! They could be from theNew Transmission Differential Bearing Retainer Oil Seal for IH Farmall and International A, A1, AI, AV, B, BN, Super A, Super A 1, Super AV, Super AV 1, 100, 130, and 140 Tractors. FREE SHIPPING!!! This oil seal is located where the output shafts exit the sides of the differential unit (see photo for location). Seal fits BOTH left and right sides of differential. Replaces Case IH Oil Seal part numbers: 71597C91, 358773R91, 358813R91, 381742R91,