In this bizarre design by Greg Irons, a series of shows headlined by John Mayall, Bo Diddley, and Muddy Waters is advertised. The shows took place in March 1969 at Winterland and also included Otis Span and Magic Sam. Most of these very large posters have some edge damage at the top.
The original poster was printed on white stock and measures approximately 13¾" x 28½"
- Greg Irons