1971 Univox Model S preset 100% analog transistor/capacitor/inductor twin-Tee oscillator drum box. Full specs/pic/audio samples at: www.drummachine.com/newpages/univox_s.html 9.5/10, 100% tested. Has a scratchy TONE pot, but I check all tunes and peeked under the hood. No docs. $85 + shipping. Paul Schreiber Synthesis Technology