Ball eject hole kicker plastic base for early Chicago Coin Machine and Stern pinball machines. Color may vary (white/black).
Reference:
4A-179-1 ball kicker plateA-144-1 kicker arm1A-269 bracket1A-271 coil bracketA-145 plunger & link assemblyA-232 coil stopReplaces 16505 and 464-2514-R