Hamza --

Back in 1969 the Shell Oil Company started an advertising campaign to encourage people to buy their gasoline. Every time you purchased gas, they gave you a nice bronze coin to place in their cardboard holder. Their campaign was successful, and other companies followed suit.

These sets sell to collectors for about $15 US dollars today. Here's one on eBay:

https://www.ebay.com/itm/203795660726?hash=item2f732affb6%3Ag%3Ar60AAOSwDsVh5zaj&nma=true&si=UXx6HCr4ut64dvXczaTPc94g8FE%253D&orig_cvip=true&nordt=true&rt=nc&_trksid=p2047675.l2557