Each Greetaphone card had an unbreakable phonograph record attached - the one above played "My Friend," a verse by Edgar A Guest. It notes in the article that, unfortunately, the recordings were nearly inaudible and that dealers were credited for the cards.
How remarkable that an idea from 1924 would be something so fun and new when introduced January 2006 - 82 years later!! Hallmark now offers more than 500 cards with music, sound clips from movies, TV shows, and commercials. The high-quality of sound and fun variety of clips has made them a big hit. Everything old is new again!