Googling gives New Rochelle for H, but this coin is not even close to my knowledge base edit: Check this link out -> http://www.coinfactswiki.com/wiki/France_1649-H_1/2_ecu
It's hard to tell when the mint mark is H or I because the letters look the same right side up and upside down. But, if it were another mint mark like say a G, like this one I used to own, it's much easier to see that the letter is definitely the mint mark. Look at the other letters on each side of it.
