I see machine cuts in the bayo lug. And the rear end of the trigger housing appears to be milled.
Which would suggest 11th year or earlier. No?
From this I would guess a possible pre-export scrub and re-serialization. ??
Something I noticed the other day was that my 23m /26\ also has these, at that point I noticed that the only SKSs I have with them are /26\ guns...it made me wonder if any other factory ever had FSBs with the cuts. I figured I would keep an eye out to see if I saw any before asking what might be a silly question like..... Were lightening cut FSBs a /26\ only component? I will just hide that question here.
I seem to recall it being considered an early trait...but if they were doing it well after the other factories were making the simpler versions, it is something I never snapped to before.
As far as the OP's new SKS....I am stuck in traffic in Shrug City on that one....and the X one too!