Featuring a 13 note pedal-board, 2 VCOs, 4 presets (one of them programmable), a VCF, a VCA, and foot-switches for Portamento, on & off, octave switching, and release on & off. These synthesizers had a very fat sound. Presets were Taurus, Tuba, Bass, and a fourth user-programmable patch.
[from The A-Z of Analogue Synthesizers, by Peter Forrest, published by Susurreal Publishing, Devon, England, copyright 1994 Peter Forrest]
Don Airey,
Jon Anderson of Yes,
Ritchie Blackmore of Rainbow,
Randy California,
Adam Clayton of U2,
Phil Collins, Tony Banks and Mike Rutherford of Genesis,
Geoff Downes,
John Hackett with Steve Hackett,
J-M Jarre,
Eddie Jobson,
Alphonso Johnson,
LaBradford,
Geddy Lee and Alex Lifeson of Rush - has two,
Duncan Mackay of 10cc,
Kim Mitchell,
Motorpsycho,
Motley Crue,
Police - on "Walking on the Moon",
Paul Raymond of UFO,
Chris Squire of Yes,
Gary Wright - on his "Dreamweaver" hit
[Let us know if you have any further additions to this list.]