AT&T Bell System Telephone Ad Rub to Reveal Magic Postcard c. 1910s Unused For Sale

This is an original advertising postcard for the American Telephone & Telegraph Co. and Bell System from the early 20th century. The front features a charming illustration of a woman on a candlestick telephone, with instructions below to \'Rub with Pencil or Coin\' to reveal a hidden message. The printer\'s mark for The Matthews-Northrup Works is visible on the side. This postcard is unposted and has no stamp or postmark, though a name is written in pencil on the back. The card shows general age toning and has slightly softened corners, with the rub-to-reveal text being very faded.