833 OD Decode

Just picked up a 833 OD transmission with stampings on the passenger side pad as follows.

"7B175015" the other stamping next to it is unreadable. There is 3 inch high
painted markings on the case and they are "873"

Could anyone help determine what this transmission came out of??
It has small diameter yoke also and a "Inland" shifter

Thanks, Jack