“It is I, C-3PO, human-cyborg relations! You probably didn’t recognise me because I’m covered in the blood of my victims.”
“Remember, the Force will be with you. Always.”
Apparently it’s TC-4, Senator Palpatine’s protocol droid who was in a scene cut from TPM.
Looks like a photo of this set:
Read more about him here:
https://starwars.fandom.com/wiki/TC-4/Legends
Also, looks like whoever took that photo you posted put palpsy’s hands on the wrong arms…
Thank you, sir! 😀
Wow an evil C-3PO!
There was also a red protocol droid walking around Echo Base in The Empire Strikes Back when Han first walks through the hangar towards his ship . R3-PO…https://starwars.fandom.com/wiki/R-3PO