It is probably an 1898 model variant, and could have been made in one of a number of countries - the proof marks and other features would offer some clues there.
I would do a search on the web (dogpile.com) keywords; Mauser+Turkey or Mauser+Turkish. Try them the other way around too.
You'll probably have to spend some time sifting the URL's. If you stumble on a "Mauser" message forum you'll probably get your answer pretty quick. Unless someone can tell you off hand here.
Good luck!