Made a few of those myself. Wow, I am old!Cool finds !
The Souvenir Medal like yours were popular at Fairs and Carnivals in the 1940's to 1960's era.
You could stamp your name, address, date, etc. on them with Metal Stamping Machines like these.
One of them that I found has - "Bob & Doris - 1947" - stamped on it.