Pair of IH Farmall A-16 Middle Buster Pivot Brackets with Bearings for Farmall 140, 130, Super A, and 100 Tractors WITHOUT 1 Point Fast Hitch installed.
These brackets are the LEFT and RIGHT mounting brackets.
IH Farmall A-16 Middlebuster (One-Row, Rear-Mounted) was built from 1947 till 1955 and could be equipped with variety of attachments.
Last photo is of the A-16 Middlebuster mounted on a Farmall Super A tractor equipped with a middlebuster bottom.
Case IH part numbers 512037R1, 512036R1, 512018R1.