The front of the card points to a place where Mutti (Mom) had stayed in Chicago. The message on the card sent to Hanna Heycke and Margarete Schröder on the island of Föhr in the North Sea in May 1960, reads:
Dear Mom and Aunt Grete!
Friday evening at 7, Betty is feeling well and Betty's mother arrived on Friday evening. It was a girl, had darker hair and weighed over 8 pounds. Greetings, Your Dieter
The stamp isn't canceled, so I'm not sure if the card was sent or not.