To create this poster, Günther Kieser first sewed by hand and stuffed this vibrantly colored, plush doll, embroidering its chest with the name of the band and crowning it with a wide-brimmed, black hat—a signature of the group’s drummer, Mick Fleetwood. Fleetwood loved the doll so much that he named it Mr. Wonderful (the name of the band’s second album) and kept it in his personal collection. When he eventually lost the doll, he hired puppeteer Billy Bryan (the creator of the Stay Puft Marshmallow Man in the film Ghostbusters) to fabricate two copies. Kieser often played the music of the bands for which he was designing posters as inspiration. This doll’s visible stitching, wide-eyed expression, and patchwork quality suggest a voodoo doll—perhaps an allusion to Fleetwood Mac’s song “Black Magic Woman,” released in 1968. This concert is widely viewed as representing a tipping point in the band’s career. Founding member Peter Green had become increasingly withdrawn and paranoid after a bad acid trip in Munich in the autumn of 1969. By May 1970, he had left the group and the band had to recalibrate to a new sound, moving away from its hardcore British blues roots.