Bally rail post & rail post cap used in virtually every Bally pinball machine made between October of 1975 (Hi Deal) through November of 1980 (Xenon). After 1980, some Bally machines still used them, but not all.
This 2-piece set includes 1 rail post (C-907) & 1 rail post cap (C-908). Both parts are new production from a newly minted plastic injection mold.
Bally part numbers C-907 & C-908.