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It may not be the same company (or at least the modern version of the company may no longer deal in razors), but Fontenille-Pautaud is a french cutlery maker in Thiers France.

Here is a link to...

Your translation seems close enough... Those words in (at least in portuguese) generally mean "for tough beards."

Can you show any pics of the other side of the tangs? that might help with an...