I would recommend you edit your thread title to "PTT Overints" or something similar, (Postes Telegraphs and Telephones) They are affectionately referred to as "Bullsheads" by some collectors.
I shy away from assessing bulk stamps, I'll address one at a time, with a good clear scan. A cursory glance at yours, I'd suggest 1,3, and perhaps 7 are genuine, the rest subject to study and opinion. They are addressed in a Handbook of Turkish Philately Teil 1 : Ottoman Andreas Birken Die Briefmarken 9. Die Kriegsaufdruck-Serien
Alas, forgeries are not shown (I do not think I have a English Translation to this Handbook / Monograph)