I have a French Laguiole knife, Arbalete brand, by G. David (no photo yet). The blade is marked 12C27 Sandvik. I have another, by Fontenille-Pataud, with the blade marked 14C28N (top knife in the photo). Can anyone tell me anything about these steels. I've been told the 12C27 is Swedish and Sandvik is the maker, but I don't know whether this is right. 14C28N seems almost like it's a composite blade. Any information gratefully received.