[Ephemera] A 37 90 89 flyer, Antwerp 1969 Small flyer, 22 x 15 cm, printed red on off-white stock. Announcement of the program for August 1969 at the important experimental project space (named after its phone number), run by Kasper Koenig. Features events by La Monte Young and Marian Zazeela (a continuous environment in sound and light with singing - from time to time), Addi Koepcke and Tomas Schmit, Robin Page, Ben Vautier (Fluxus concert and '7 ideas of Ben', and Lidlweek, a faux sports event organized by Immendorff and friends, which involved a football match, a balloon trip and cycling training. Rare and exciting document in near mint state.

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