>>20228225>I have a similar one but of a smaller denomination (1 franc) dated 1870They aren't the same, what i posted is a Napoleonian écu from 1797, so nearly a century older.
What you have is a Cérès, with the obverse like this one pic rel, right?
I doubt it's a fake one, because it's was a fairly common coin. But i doubt it's from 1870, because it was still Nap III on the coins, Cérès started in 1871. And Nap III Francs looks totally different.