This early 20th century All-My-Tee is marked Pat. Pending No. 66177.  The rubber has seen better days, but the tee is still very presentable and would make a solid addition to a tee collection without one of these. The end that hold the ball would unfold and extend up higher if the golfer wanted a higher tee.  However, because the rubber appears to have been in this position so long, I would advise against unfolding it or it might break off—there is already some cracking around the edge. There is also some cracking in the rubber between the two ends of the tee, but the tee still seems solid enough.