A folder for postcards. On the front is an aerial view of the Spreckels Organ Pavilion in Balboa Park. One of 23 connected postcards. Each of these images is printed on paper rather than a heavier cardstock, made to fold up inside covers of card stock. This mailpiece must have been produced between 1927 (when the El Cortez Hotel pictured here was built) and 1930, when the Bank of Italy changed its name to the Bank of America.