In early 1967, the collective were contacted by Robert Stigwood, then manager of Cream, to work on instruments and costumes for the band, which was about to leave London for their debut tour of the United States.
[1] Koger and Posthuma painted Clapton's Gibson SG, a drum kit for Ginger Baker,[4] and a Fender Bass VI for Jack Bruce, which he did not like very much and played only on TV performances.
The centrepiece on the face is a cherub holding a triangle, surrounded by yellow stars on a celestial blue background ("a Fool hallmark").
Flames come up from the bottom of the guitar (the treble bout with the volume and tone controls) and the bass point has rainbow-coloured arcs.
The Fool's signature style featured highly colourful creations often drawing on Indian spiritual culture, among other influences.
This trend rapidly gained international recognition, mainly thanks to its adoption by popular bands including The Beatles, Donovan, The Rolling Stones, Cream, The Jimi Hendrix Experience, and Procol Harum.
The Fool is an essential part of what Clapton called the "woman tone", "a sweet sound ... more like the human voice than the guitar".