WOW! Am I Jealous!
My first ever wargaming army was an Ottoman one for ww1. I've never seen figures like that before as I do find Ottoman figures to be a rarity, luckily more recent companies provide nice ranges for them. That would be a set of late war Ottoman troops even potentially the early 1920's, however, the uniforms varied immensely from person to person. I believe some Kurdish officers in the cavalry used to wear traditional Kurdish dress when in battle, so most likely you could get away with using them for anything really.