This rear wing is from MP4 26. The shape of drs actuator is very basic. Later all teams reshaped it like RBajprice wrote:Higher res of that twitter image. I can't see any recent images either of the MP4/29 or 30 with the curved rear wing like that, or the red engine cover fin? (bottom left corner)
https://pbs.twimg.com/media/CbpXKC-XIAA-XjW.jpg