Markings are wrong, stock is wrong. However, my guess is you are partially correct.
I"m thinking it began life as a 1908 and then was updated during the 8mm standardization program. Although it is weird they would scrub and remark the receiver. However, the Turks were a bit sensitive about the Ottoman past and I can see them doing that.
There just isn't any info about this rifle and very little about how they went about their Mauser Standardization program.