This incised triangle pattern ball was made in 1912 by B.F. Goodrich Co Ltd. It's claim to fame at the time was selling for $6.00 a dozen (which was a low price) and thus being "The only ball with a depressed style of marking that sells at this price." Stamped "The Meteor" on one pole, and "Pat. Apr 11.99" on the other, this ball is Mint.
This ball is back row center in the group shot in the accompanying images.