I know a little bit about pins, no expert by any stretch of the imagination, buy even I know that plungers have been around for many years before the manufacture date of that pin.
Bit off topic.
What's a turret shooter?
Instead of having a plunger, and plunger lane and an outhole, the ball drains into the cavity under the apron. There is a an assembly which is very similar to a slingshot assembly. When the ball drains and rolls onto the switch, the machine wait until the flipper botton is pressed (ususally the right button), and the assembly launches the ball onto the playfield. Pro Football is the most common machine with this feature.
