This Remington manufactured late variation left side receiver bushing with bannana shaped takedown screw retainer is for the later model 12 slide action rimfire rifle and is in good condition exhibiting a grayish brown patina with light rust specks.  (file photo)

Note: Remington model 12 takedown slide action rimfire rifles with the following serial numbers have been observed with this part: 351695

12-A: 100823 & 802984

12-C: 408616, 409187, 597770, 640490 & 722004