This is for 4 original pieces from the legendary Ann Arbor Film Co-Op.  These are undated, but are from 1979. I arrived at the date based on the admission price of 1.50 (it raised to 2.00 in 1980) and the date of week/date combination.  This lot includes:

2 copies of a 8 1/4 x 13 3/4" flyer for a screening of Jim Hendrix and Rainbow Bridge at Angell Hall on Thursday April 19.
1 copy of a 8 1/4" x 13 3/4" flyer/schedule covering Wed Jan 24 - Thur April 19, including movies such as Summer in the City, Woodstock, The Grateful Dead Film, The Man Who Fell to Earth, The World's Greatest Sinner, Fantastic Animation Festival and more.
1 copy of a 8 1/2 x 11" mostly handwritten flyer for the Jimi Hendrix / Rainbow Bridge double feature.  This has a 1 1/2" tear on the bottom edge running between the "e"s in "See", and a 1" tear on the left edge at the word "Hall"

Very cool pieces!