Crusader or French silver coin?

This one is not my coin but asking for a friend. The coin is 19mm in diameter.

Hello,
It's a denier minted at Guingamp (a french town) in the duchy of Brittany : we can read "+GVINGAMP" on the reverse.
I hardly read "+STEPhAN COM"on the observe : https://en.numista.com/catalogue/pieces35921.html

Quote: "Cycnos"​Hello,
​It's a denier minted at Guingamp (a french town) in the duchy of Brittany : we can read "+GVINGAMP" on the reverse.
​I hardly read "+STEPhAN COM"on the observe : https://en.numista.com/catalogue/pieces35921.html
​

​Thank you! It seems that all of them have the same legend: http://monnaiesfeodalesdebretagne.blogspot.com/2011/02/monnaies-de-guingamp-au-type-de.html which will make this harder to pin down the ruler for sure.

There is another one with alain too but the legend doesn't match : https://www.cgb.fr/bretagne-comte-de-penthievre-anonymes-monnayage-au-nom-dalain-denier-tb-,bfe_331885,a.html

The ones with stephan are anonymous : the best we can do is to find the exact type, but most elements are based on the face style.