This a more developed Cinderella. It apparently came as part of a perforated sheet of stamps. It has glue on the back.
In May of this year, a second well had just opened up in the Permian Basin in Texas…on land owned by the University of Texas. Whoopee! Break out the bubbly!
I browsed the AGA monthly issue that had notice of this convention in 1923. The proceedings looked…well (pun intended), interesting to them what was there, I’m sure.
Nice poster design, though. The stamp is 2.25″ x 3.5″