How fun are these! There are 5 jingle bells attached to the original cards (most likely from the 1950s). There is a copyright symbol (©) but it doesn't indicate a year. The card reads:
NOEL Jingle BELLS
FOR USE ON GIFT PACKAGES, SKATES,
TREES, PARTY COSTUMES, ETC.
ANOTHER TRIM-A-TREE PRODUCT
The bells are attached through punched holes and and are held on to the card by a thin piece of wire that is threaded through each bell on the back. Each bell measures about 1 centimeter. We have packaged these in an old-timey real cellophane bag to protect the packaging.