Part of AS-2911-14 switch and bracket assembly for early Bally solid state pinball machines.
Reference:
AS-982-115P

Leaf switch - rollover switch & diode Ball

Leaf switch and diode assembly Bally

Pop bumper switch Z bracket Bally

Leaf switch - rollover Bally

Leaf switch Bally saucer

Leaf switch outlane Bally

Leaf switch Bally coin door slam