1950s Book of Knowledge Invitation Letter/Includes Addressed & Stamped Envelope

Description

For sale is an early 1950s Book of Knowledge Invitation Letter for a free “Ride the Magic Carpet” booklet for children. Includes Addressed & Stamped Envelope. Envelope has been opened, letter is in perfect condition. Envelope measures 7.5” x 3.75”. Letter is 10.5” x 7”. FYI, I am determining the age of this piece by when the family moved away from this address and also the age of the addressee at the time of their move. The postmark does not show a date.