Scarce original 17.25 x 22.5 poster for the canceled Led Zeppelin concerts as part of the ‘Day on the Green’ summer series presented by Bill Graham, scheduled for August 23 and 24, 1975, at the Oakland-Alameda County Coliseum in Oakland, California. Designed by Randy Tuten, the poster features a large group image of Led Zeppelin behind central text listing the supporting acts as Joe Walsh and Pretty Things. In fine condition. Booked as 'Day on the Green' shows Nos. 4 and 5, the concerts were ultimately canceled when Robert Plant suffered serious injuries in a car crash in Rhodes, Greece, on August 5th. This significantly affected the production of Led Zeppelin's seventh album Presence for a few months while he recovered, and forced the band to cancel the remaining tour dates for the year.