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Maybe I'm wrong, but it looks like a 1935 Brazilian stock. The finger grooves in the forestock look like it, as does the handguard. For a second there, I also thought someone had stuck on a lange vizier sight just ahead of the handguard, but It's just a shadow from the person behind him.
I just did a little research and I am now leaning toward a Turkish 1887 with a different stock. Did not know they further refined the 71/84. According to Wikipedia, some 71s were built in 7x57 and 7.63x53, so they might still be used by rebels and others around the world.