[Vercingetorix medallion identification]

Hello ,

 

I have been online for days trying to find this coin to determine if it is real or fake what it is worth etc....

 

My mom found it 40 yrs ago in a bush and tasked me with this pursuit...please help wise ones.

 

Thanks

 

Left side has vercingetorix along the coin and a male looking left handlebar moustache dreads and pursed lips

other side has a horse running left with a male three dots below horse face

 

Any help would be great thanks