Brunswick Pro Block a Shot (1976) pinball arcade game

A close look at a Brunswick (also branded as Briarwood) Pro Block a Shot pinball arcade game. This game was made in 1976 and is the only one I've seen in person. It operates as a simple EM with two scores, a spinning Quarter timer, and three balls that the player uses to pop up the pass, shoot, or block players on the playfield. Simple game, but very interesting.