20 Franc Gold Coins - 1859, 1876, 1909

A neighbor had a family member pass away recently and he had a small coin collection. The coins he had were mostly face value coins but there were a few nicer ones. As I came to the end of looking there was a plastic food container full of international coins all loose in the container. At first glance, they looked like mostly face value assorted coins but I decided to dump the container on the table and have a quick look through and in the container found what appears to be three 20 Franc Gold Coins. I did a quick magnetic test and they are non-magnetic and feel like gold to me. Just wanted your thoughts....I find it odd they were buried in a container of worthless coins. Here are some pics.