IH Farmall 656 gas/ IH 240 Utility/ 2, Super C Farmalls/ 2, Farmall A's/ Farmall BN/McCormick-Deering OS-6/McCormick-Deering O-4/ '36 Farmall F-12/ 480 Case hoe. '65 Ford 2000 3 cyl., 4 spd. w/3 spd Aux. Trans
I ran that part number through Messicks, and it comes back to a spring, not a seed shoe.
Here's a link to the Case/IH online parts store, set to the # 10 grain drill. Maybe it will help you find the part, or correct part number for what you are looking for. Complete machine | Case IH | MyCNHi US Store