Unknown: electronic concert

Concert date: 
Wednesday, October 28, 1970
Works performed: 
Unknown
Concert venue: 
ORF
City: 
Graz
Programme text: 
Billed as the Ensemble Karlheinz Stockhausen. Another programme for the events has a picture of Studie II. Is this where Peter Manning heard Studie II and spoke to KH about it afterwards?