These flyers are from the early 1970's.
Printed on cheap construction paper, these were usually available at the record stores in the Bay Area. Most were printed on one side. Some were printed on both and may have an ad, like the one for Slade, shown here. The early ones were just text, but later they added photos and graphics. Few of these have survived. Amazing to see the many bands that toured and for around $5. This was before Rock music became a major corporate controlled business!