See back of card.
It is unknown when children began writing letters to Santa Claus. His residence at the North Pole was established in a book titled Santa Claus and His Works, published in 1869. In this illustration by Haddon Sundblom for The Coca-Cola Company in 1945, Santa enjoys a bottle of Coca-Cola while reading one of the millions of letters mailed yearly from children around the world simply marked... Santa Claus c/o The North Pole.