Produced by the Keystone Mfg Co, of
Chicago, Ill, this Keystone sand tee mold was covered under a 1928
patent issued to L.E. Johns. The mold itself is made from bakelite and
includes a spring-tensioned plunger. After loading up the cup with
moist sand, the golfer need only place the mold on the ground and push
the button on the top. This would to eject the sand as a ready-made
tee.