Bert Jacobson sent the postcard to his mother in Pauls Valley, Okla., in January 1967, when he was 13 years old. The card, from the Old Country Store Museum in Hereford, Penn., arrived last Friday.
Jacobson tells Tulsa television station KOTV ( http://is.gd/5MzAmX) that he traveled to the East Coast with his father and cousins to buy concrete trucks and mixing equipment for the family business.
The postcard was sent with a 4-cent Abraham Lincoln stamp. The card reads: "Mom, Hi. We've been having a great time."
Jacobson's sister, Marilyn Hubbard, says their mother wasn't surprised that her son sent a card—only that it took 46 years to arrive.