Jumping disc novelty

When you indent a disc and place it on a flat surface, after a while it will spring back into its original position and jump several feet into the air. The instructions on the envelope provide the all important details. Note that the novelty was supplied by a tobacconist. It was not unusual for tobacconists to stock such items.

Details

Size Envelope size 110 x 65mm. Disc diameter 25mm.
Date Probably first half of the 20th century.
Key Phrases
Category
Ref no N2551