Steve T is correct in telling you it is a post war link belt, but it is a french 7,5mm belt and not german.
I have posted a pic of the french model and the postwar german.
The 7,92mm rounds are WW II period, it is not abnormal to see tourists buy these, jammed in a french mg belt as most of them don't know the difference.
Probably a tourist who bought it and lost it on the beaches.
German war and postwar links are exactly the same except the connector tab, it is curved and the links have a groove on top down the middle.