Industrial pneumatic push-button control valve

Pneumatic push button valve for controlling compressed air systems, air cylinders etc.. The push button is blue finished metal and is engraved "PUSH". The button measures about 3/4" in diameter.

The valve body measures about 2" square, 1" thick and 3 1/2 " long overall. The compressed air line ports are marked "G" and "P" and are about 3/8" I.D.

This is from the estate of an industrial engineer and looks in nice condition with some wear.