The poster for the event reads:

Allman Bro. Band and Cowboy
Sept 27 – State Fairgrounds Music Hall – 7:30
Presented by 12 Street Productions
Tickets Available At Box Office And All Titche’s

…and in the lower right corner it is “signed”: Marum ’71

Anyone have any more information to share about this one at all? Did Boyer or Talton perform with the Brothers during their set, etc etc etc???