What exact coin was this die used to mint?

All I know is that it's for an ottoman empire coin, unfortunately, it's only one side, and it's not the one that has the coin's face value…

I believe the other part wold be like an anvil or something big, or maybe just a little changeable cap on some anvil-like surface, sorry for the lame asumptions, I'm totally ignorant about how coins are made, anyways…

I tried hard to read the date and it seems like ١٢٢٢ or ١٣٣٣ (Hijri calendar), which is 1222 or 1333 in Latin letters (and might be any other combination like 1323,1232, etc…)

And also btw, how much would you pay for it?

(Note: I don't actually have it, somone  was selling it and it made me too curious)

The date reads 1222, with a regnal year of 21. Although I'm not expert in Ottoman coins, the design seems overly simple to me, for example I don't see a border around the edge. It makes me suspicious that this could possibly be a die for one of the many imitation coins used for jewelry, also called “belly dancer tokens.” Hopefully one of our members more experienced with Ottoman coins will be able to provide a more definitive answer. 

I don't think it would be

I have seen lots of such simple designs for normal coins like 10 kurus, but I just feel like they all share the same obverse, the goal now is to find a coin struck in 1222 and has a 26 regnal year versions at least

And also btw, the coin's colour doesn't have to be the same as the die

Thank you for helping!

You also know the diameter. That might help to limit the search.

This one looks close but obviously can't have an RY of 21 which would support a costume theory die.  N#42826

An Ottoman coin from 1222 AH with RY 21 puts it in Mahmud II reign. https://en.numista.com/catalogue/index.php?e=ottoman&r=&st=1-2-3&cat=y&im1=&im2=&ru=2454&ie=&ca=3&no=&v=&a=&dg=&i=&b=&m=&f=&t=&t2=&w=&mt=&u=&g=&se=&c=&wi=&sw=