Common pop bumper body used on many brands of electromechanical and early solid state pinball machines.
Reference numbers:
Bally C-114-3
Data East 545-5099-00
Williams 3A-6008
Williams 03-9675 (CIRQUS VOLTAIRE)
Stern 4A-112-W
Chicago Coin Machine 16511
Gottlieb 8897
Atari pop bumper 006065-01
Bally assembly ASE-2222-4
Brunswick 55-101015-000