Help with identification please

[kai]

Thanks for the additional data! Looking forward to seeing more pics.

I think chmorshuutz nailed my artifact.

Nah, I beg to differ: If anyone, then Carlos did it!

Some of these wall plagues have names on the pieces. I'd first try to find one which also have this type of blade with a name...

The top edge of the blade just ahead of the hilt is marked with XII. The patina on the mark matches the rest of the blade but may have been later added by a previous owner?

These marks are quite common on blades throughout the region. Extremely likely to be original.

Regards,
Kai