Rare “Ummagumma” album signed on the cover in black and blue ballpoint pens by Pink Floyd band members Nick Mason, Richard Wright, David Gilmour, and Roger Waters. Measuring approximately 12” x 12” and in very good condition, with some signs of scattered wear, including some light damage to the edges and slight toning to the white colors, not affecting the signatures. Record is included. Accompanied by full Letters of Authenticity from Grad, Floyd, JSA, and Tracks. An outstanding period-signed example of Pink Floyd's landmark 1969 double album "Ummagumma," featuring the complete four-member lineup of Roger Waters, David Gilmour, Richard Wright, and Nick Mason. Released during a pivotal period in the band's evolution, the album uniquely combines live performances with individual studio compositions from each member, capturing Pink Floyd's transition toward the ambitious, experimental sound that would define their subsequent work. The iconic Hipgnosis-designed cover, celebrated for its inventive use of the Droste effect, provides a particularly striking backdrop for the signatures, which are displayed across the gatefold. A highly desirable example of early Pink Floyd memorabilia, distinguished by its period signatures, complete lineup, and extensive authentication from multiple respected authorities.