Can confirm now that TC-LKF, a recent addition to the 77W fleet, is indeed configured C14Y478 with dark ages Emirates J seats in front (2 rows) and the rest in 2005ish Emirates Y (3-4-3).
IFE/Video sys is disabled (screens covered by a large off white stickers, safety demo fully manual). Acft type seems to show as "Boeing 777-300ER" in flight info on TK website (as opposed to just "Boeing 777" for the standard 77W config).
Acft has no livery, and there's quite a lot of tape holding the cabin together. Used to be operated by RU charter operator Royalflight.