1977 Easter Rock Festival Ticket Stub. EASTER ROCK FESTIVAL Organized by Mama Concerts in 1977. The festival stopped in four German cities; Offenbach. The lineup included Black Sabbath, The Ian Gillan Band, AC/DC, and Doctors Of Madness.On some days, they were supported by Caravan, John McLaughlin's Shakti, and Jane. This item is in the category "Entertainment Memorabilia\Music Memorabilia\Rock & Pop\Artists B\Black Sabbath". The seller is "mizliz1984" and is located in this country: US. This item can be shipped worldwide.