POCKET ENVELOPE
Production D1926 A.C. Gilbert Catalog Envelopes, approx. 6 x 9" in size for the pocket consumer catalogs. These were used for storage of the consumer catalogs and sending via the U.S. Mails in the 50-60s. Envelopes are with glue on top of flap for sealing. I had these made when I was more into the mail order business 20 years ago, and were found when I was going through some old inventory.