Red drop target for many early solid state Gottlieb® pinball machines.
It's recommended to replace drop targets in full sets to avoid repeated reassembly of the drop target mechanism. When one old plastic piece fails, the other typically break shortly afterward.
Replaces or equivalent to part numbers:
A-11905
A11905
11905U
B-11905-10
B-11905U
Wico 03-078400
Reference:
A-11905-R