1976?? 77?
1976! Someone taped the Yes set:
https://www.youtube.com/watch?v=kquodhaWXqQ
― Josh in Chicago, Monday, 15 April 2024 17:18 (two weeks ago) link
They're both in G as well.
― Halfway there but for you, Tuesday, 16 April 2024 20:58 (two weeks ago) link