I know there are a number of coin collectors here so I am hoping someone knows about this coin.

I have this coin that is gold (not pure). I know it is a 20 Franc from France and is called a "Rooster" but that is all I know. It looks like it is in pretty good shape but I have no idea what it would grade. Can someone tell me more about it, and possible value? I do not collect coins and am pretty ignorant of them. Any info would be appreciated. Thanks!