And this is not like in the description that the secret of forging these swords is known only to barbarians (Cimmerian) and probably Nordheimer? and only these smiths will make these swords.
This is for a long time and consistent with the description on the wiki 
"Hardened steel, finely wrought, forms the blade of this massive sword, baring the swirling markings of a Cimmerian clan.
Great swords are faster than many other two-handed weapons, and their great reach makes them ideal for fending off groups of opponents.
Cimmerians may be called savages and barbarians, but their understanding of metal smithing is relatively advanced. They know the riddle of steel, how to harden it for greater durability and vicious wounds."