Hi everyone I collect old coins but I always save my foreign coins or money I find and I bought a 2 pound bag of foreign coins on eBay and I got this coin from France and it was minted in 1855 B, I believe is Dieppe. My Grandmother who lived to be 97 her maiden name is Courbat and it is Swiss/French and I love to look up my family tree and my Ancestors just left a few years before to the United States.
That's neat B is Rouen, not Dieppe though A price guide here : https://www.lefranc.net/monnaie,cinq-centimes-napoleon-iii-tete-nue,116.html Yours is F.116/18 Q