Sword 12/13 century or not?

[Bob A]

Originally Posted by serdar

Metal from 12 century from one foundry is diferent from fake, but if this is original it can have similar metal composition like 12 century known original.

Fake is never good, they are made for scaming people.
Its beter to buy cheap modern reproduction and hang, than to buy fake.

I suspect a sophisticated (and therefore expensive) analysis of the metallurgy involved in this sword might actually be determinative, though I admit a paucity of knowledge on the subject. A sword made a millennium ago would likely have indicators of its age. Perhaps modern forgers might go to the trouble of smelting and forging in a fashion to imitate the earlier processes, but it would be pretty troublesome to do so, done in the hope of a payoff equal to the effort involved.

Regarding the value of a forgery, I have no quibble with your ethical stance; my thought, which I ought to have qualified at the time of writing, concerned the educational value of demonstrating the process of fakery, and alerting the unwary.