The SIXTRAK Diagnostics ROM can also install factory programs and sequences into memory. Instructions are included
*** Sequential Circuits Memorabilia ***
THE First MIDI Operating System Prophet 600 Six-0-1 OS ROM ** $30
In December of 1982 Sequential Circuits shipped 25 Prophet 600 keyboards with OS Six-0-1 These Prophet 600s became the world's first commercially available MIDI synthesizers.
Vintage Sequential Circuits SIXTRAK Promotional Stickers * Ten (10) for $10
Ten (10) Vintage SIXRAK Promotional Stickers with pressure sensitive adhesive backing
Original Power Supply Board #5 Prophet-5 Bare PC Board ** SOLD
Original Power Supply Board #5 for Prophet-5 * Bare Board Memorabilia * One (1) available
Original Prophet-T8 Wooden Key * $8 Souvenir * Memento * Pieces of T8
White Key from Original Sequential Circuits Prophet-T8 keyboard
White Key from Original Sequential Circuits Prophet-T8 keyboard * Side View
Original T8 Black Wooden Key * $8
Black Key from Original Sequential Circuits Prophet-T8 keyboard
Original Sequential Circuits Brochures Prophet VS*Prophet 2002*Prophet 3000 Three (3) Brochures for $12
Three (3) Original Sequential Circuits Brochures: Prophet 2002 * Prophet VS * Prophet 3000
**** Original MIDI Chart MIDI-5 **** for 10 Sequential Circuits instruments Vintage 1985 ** $6
Original Sequential Circuits MIDI Control Summary Chart MIDI-5 covering 10 SCI instruments Drumtraks * Prophet 600 * Prophet-5 * Prophet-T8 * Prophet 2000 * MAX * Split-8 * Sixtrak TOM * Multitrak ** 2 sides ** Rigid Cardstock Paper Folds Out to 11 inches by 17" inches
** Original C64 Operations Manuals ** Three (3) CM64A Manuals for $15
Original Operations Manual CM64A for the C-64 Sequencer & Commodore 64 computer January 1984 * Collector Quality Condition
Original Quick Reference Guides for Multitrak & TOM * Both for $10
Original Quick Reference Guides for TOM and Multitrak on 11"x17" card stock * Mint Condition * still wrapped in plastic *
Sequential Circuits Service Department Original Field Bulletins
Two (2) original Sequential Circuits Inc. Publications * Field Bulletins #8 August 1982 and Publications Index TN10 August 1985 ** Collector Quality Condition
Four (4) original Sequential Circuits Inc. Publications * Field Bulletin#7 May 1982 * Field Bulletin #12 July 1984 * Field Bulletin #13 April 1983 * Field Bulletin #14 July 1985 Individually Stored in Clear Plastic Bags for decades in Collector Quality Condition
Click or Tap on pictures to enlarge.
Model 800 Original Operation Manuals $15
The first Sequential Circuits product sold was the Model 800 sequencer, an accessory developed for use with Moog and ARP synthesizers. It was followed by the Model 700 Programmer, a control panel device allowing users to PROGRAM Minimoog and ARP 2600 synthesizers and SAVE PATCHES to memory.. followed by the PROPHET-5.
Click or Tap on pictures to enlarge.
Two (2) Model 700 Cables for $19
NOS Sequential Circuits Model 700 Cable * Cinch-Jones Socket to 1/4 inch plug
NOS Sequential Circuits Model 700 * 7-pin Viking cable
Sequential Circuits/SEIL Manuals Operational & Tech * Four (4) for $15
In 1983 Dave Smith visited SEIL in Italy & agreed to place the SEQUENTIAL CIRCUITS brand
on 3 SEIL keyboards in an unsuccessful attempt to increase SCI's sales & profits.
The SEIL Orchestra II became the Sequential Circuits Prelude
The SEIL Cruise became the Sequential Circuits Fugue
The SEIL PX became the Sequential Circuits Piano Forte
PRELUDE Operations * PIANO FORTE Operations * PIANO FORTE Technical * FUGUE Technical
Original Fabrication Drawings and Storage Vault Cabinet * SOLD
Complete Fabrication Drawing Packages for the Prophet-T8, Prophet VS keyboard & rackmount, Prophet 2000, Prophet 2002, Studio 440, Prophet 3000, Prophet 3002, Sixtrak, TOM Drum, Prophet Remote and more have been SOLD. Original Fabrication Packages contained all drawings, documents, artwork & PC films used to manufacture products identified by SCI Model Number, as well as documents for product designs prototyped but never produced. *****SOLD*****
This is the Original Legend Directory that organizes & identifies documents by type & content.
Original Sequential Circuits Inc. PC Artwork from the Prophet VS fabrication package.
Original SCI Schematics and PC Artwork from the Prophet-T8 fabrication package.
Original SCI Mechanical drawings from the Studio 440 fabrication package.
Mechanical Drawing detail for the Studio 440 Control Panel.
The Complete Sequential Circuits Inc. fabrication drawing packages include schematics and mechanical drawings on drafting vellum paper for blueprints, original artwork & films for printed circuit boards, silkscreens, labels and assembly drawings for production. The number of multiple documents included in each Fabrication Package varies in weight from 25 lbs. for the Studio 440 to 38 lbs. for the Prophet-T8.
These original documents were stored in a special hanging file storage vault in SCI's Engineering Department bearing SCI Property Tag #1857. Since 1988 this storage vault of original drawings has resided with Wine Country Sequential, the contents of this vault (including the storage vault) have been SOLD.
Sequential Circuits Property Tag 1857 affixed to Fab Package Storage Vault.
Original Sequential Circuits Fabrication Drawing Package Storage Vault dimensions: 59" wide x 29" deep x 43" tall
Prophet 2000/2002 Digital Samplers Original 256K Model 875 Sound Disks Fifteen (15) Disks * Vintage 1985 ***SOLD***
Harp * Pipe Organ & Hammond B3 * William Dowd style Harpsicord
************ FOR SALE *********** SEQUENTIAL CIRCUITS Domains SequentialCircuits.net SequentialCircuits.org SequentialCircuits.info SequentialCircuits.us SequentialCircuits.com
Last Update: May 6, 2026
For lower shipping costs when purchasing multiple items email us at Sales@WineCountrySequential.com and request a PayPal Invoice for your order.
International buyers are responsible to pay directly to the applicable agencies any import duty or taxes levied on the merchandise by their governments. Buyers inside California are subject to State Sales Tax on the cost of merchandise.
Sequential Circuits PARTS sales continue until SOLD OUT.
No Refunds * No Returns * No Exchanges * ALL Sales are Final
PROPHET® and SEQUENTIAL®
are trademarks of SEQUENTIAL® LLC
used by Wine Country Productions Inc. under license.
