Sequential Circuits Pro-One BROCHURE, color, glossy, 4 pages, vintage original

Sequential Circuits Prophet 600 OS SIX-08 EPROM Firmware Update KIT / New ROM

SEQUENTIAL CIRCUITS STICKER & 4 BUTTON PIN SET TAGS: DAVE SMITH KORG NOVATION

Sequential Circuits Prophet VS Version 1/2 MS/LS Software Chip Set - VINTAGE

Sequential Circuits Pro One Analog Synthesizer Original Operation Manual c.1981

Sequential Circuits Prophet 5 - Rev 1 & Rev 2 *rear large badge* NEW

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Sequential Circuits Prophet 600 OS SIX-08 EPROM Firmware Update KIT / New ROM