i agree with Pogor1. 3 different dates. In one Freddie is on Darth with the Flash shirt and the Darth with the cooler chest plate. Another is with the crappy cloth chest plate without the Flash shirt and a third is with the crappy cloth chest plate and Freddie with the Flash shirt. I wonder if George Lucas cried "fowl" when he saw the crappy outfit they dressed Wally Gore in before he threatened to sue them for using his character?
I just received some new pictures from Zurich 80 and Freddie has the devil horns for the second encore. That old Darth Vader picture is definitely mislabeled.
It looks like they retired the Dark Vader gag after the second leg of the 1980 North American tour. According to the pictures we have, it was Darth Vader in Toronto (Aug 30) and devil horns already in Detroit (Sep 20).