Notes
Keystone calendar bills "Bluegrass", then band name, band members and instruments, including "guest fiddler" Vassar Clements. BB pretty much the same, but says "special guest fiddler from Nashville". HDR listing day of first show bills merely "surprise".
ref: July 1973 Keystone Berkeley calendar image, via Merl Jr., who got it from Fred;
preview: “Jerry Garcia’s Bluegrass Group to Play at Keystone,” Oakland Times, July 17, 1973, p. unk;
ad: Berkeley Barb, July 19-August 1, 1973, p. 21;
listing: Hayward Daily Review, July 20, 1973, p. 44;