Comments, please on Turkish Knife, made from a file

[katana]

I have posted this knife before, to ask if it had a specific name.

Now that I've received it, I've more questions than answers
I will assume that the blade is a reworked file, sharp and has a brass and silver (?) detailing. I know there have been a few 'file knives' posted, is this very common? Is it a better grade of steel compared to locally available steel.
Basically, any info on origin, function, age or general comments, gratefully received, thankyou.