The first couple of Milestones are really good, but do not reflect the real quality of his band at the time. McCoy was a MF then and nobody really knows it. I remember being at a McCoy gig - next to me was Cecil Taylor and he was jumping up and down - yelling. It was a great night.
Funny you should mention hiding. Last time I saw her was at the Chicago fest when I was "running" it. She latched on to the limo driver we sent to the airport and she would not let him go for a couple of days. This very pretty black guy looked to me for help and I had to bow out. Go SV!
FWIW, Agfa 525 was the exact tape I received of the AEC recordings from Pathe Marconi in 1970. Would the same formulation/designation be in use 12/13 years later?
It is professional tape.
The price is nuts, but it is worth something if an original.