You can learn more about Dating Curt Teich Postcards at the Curt Teich postcard archives of the Lake County Forest Preserves.
Postcard producers printed cards that followed the current trends of postcards.
While a date range can only be supplied with most unused old postcards, post cards published by Curteich (known as Curt Teich in earlier days) from the mid-1930s through the 1950s have an easy-to-understand built-in dating system.
Looking at the back of the motel postcard, one sees a code printed in the stamp box at top right.
The letter A has been used as guide to dating curt teich postcards standard.