These 2-3/16" yellow no logo flipper bat are seconds. They have slight color imperfections. See secondary picture above for clarification.
These bats are used in various American Pinball, Data East, Sega & Stern pinball machines.
In regards to Williams/Bally flipper bat #20-9264-6, this is a suitable replacement but not an exact replica.
Data East/Sega/Stern #515-7191-06.
Williams/Bally #20-9264-6.
American Pinball #VHR-BASM0004-00.