Old stock - never used - Dennison Mailing Cards for USA coins.
They must have been simpler times, indeed, when coins could be easily mailed with no threat of pilfering. These once white coin cards were used for paying for merchandise through the mail. Many people did not have checking accounts - indeed, some did not trust banks - some still don't. The Dennison company was well known for making this type of utilitarian item.
The address area includes Zip Code, so that should help identify the era.
The card measures 5 inches by 3-1/4 inches (with the flap closed). The coin holder is made of cardboard and the backing and flap are made of sturdy paper. The cards have faded into a nicer eggshell color with age.
This is labeled COIN MAILING CARD NO. 4 and it was created to send up to US$1.70 There are 7 openings:
You can decide what coins you will use to fill up the card. Ours coins total $1.41 on the card.
The blank top on the address side was available for advertising or a rubber-stamped company name. The instructions are beneath the coin circles:
INSERT COINS AND FILL IN NAME AND ADDRESS ON FLAP
The flap covers the coins. Of course the coin card makes a great collectible, or use it for its purpose. But, you might also want to alter it and use each of the circles as a frame for a thought or a photo or what have you? Pretty cool for a stocking stuffer, too.