The penchee ending of the adagio dates back to Sergeyev, at least. This can be seen in the 1968 Kirov movie (it was originally shown in theaters), attributed to Sergeyev, but with some slight alterations (not, I think, in the adagio) in order to show off certain modern effects possible with film. In the early '80's it was released by Kultur as a video cassette ($60, isn't progress wonderful?), but somewhat cropped for format. It still is a very pleasing, nicely filmed version (you see the whole adagio, no stupid reaction or audience shots).
Makarova was to have danced O/O, but a late change gave the role to Yelena Yevteyeva. Siegfried and the Jester were, respectively, Markovsky and Panov.
Yevteyeva's Odette looks very much like the version Markarova danced in the 70's and 80's with ABT. The complete and quite beautiful Act II has been on google's video site for three years, but I don't know if I can give the link here. If one of the moderators wishes to PM, I will send her/him the link and the moderator can decide (one might suspect that google would be "legal" about this, but I know that I don't know).
From the for-ballet-lovers-only site one learns that Yevteyeva, then just 21, later taught Pavlenko and Zakharova, and was coach for Sologub, Makhalina, and the greatest Odette of them all, Veronika Part.
http://www.for-ballet-lovers-only.com/Yevteyeva10.html