I don't know if cgb.fr has a correct reference link to - Dy.1130 - . If it is correct, then there is a reference mistake in the numista page of 1 Franc
I need someone who has an access to the catalogue ‘Les monnaies françaises royales’ by Jean Duplessy to check this
My bad, I didn't noticed it yesturday. :( Your link actually isn't a ¼ Franc. It is 1 Franc. Also it has diameter 33mm and weight 13.9g according to 1 Franc coin.
My coin has diameter 25-26mm and a weight ~3.4gr according to ¼ Franc coin. That's why I continue to search an information about my item... :)
Oh, this looks very similar to mine! But unfortunately this side of the obverse is undefine… But I wonder if the ‘K’ mintmark is duplicated on reverse too? I tried to compare coins:
It is very interesting web-site, thank you! I've searched for other mint years and it looks like my coin is more sililar to BAYONNE mint because of shape of the portrait and digits “15xx” and the anchor symbol and ornament details on the reverse. Here is 1 Franc of BAYONNE 1580 and 1 Franc of BAYONNE 1579