Monophonic Synthesizer from Sequential Circuits Instruments SCI

Pro One serviced in excellent condition and shape as you can see on the pictures.

This is a J-Wire Keyboard (serial number 2xxx)

Service details :

The important Chips has been soldered on sockets so that it is easy to
change the parts that could have some problem in the future.
- All the pots have been cleaned and lubricated
- The J-wire keyboard bus and wires have been cleaned
- The Turbo CPU and midi will be ordered and installed when the payment is cleared, the reception and installation might take around 10 days.

If you have any questions, feel free to ask us.

Shipping process includes the packaging / Wrapping of the synthesizer,
please understand that it takes some time since we try to pack it as
safe as we can.

Standard delivery (~ 10 to 20 days )
Express delivery ( ~ 7 days )

It may varie depending on the Customs.


The terms written above apply to all the synthesisers on this website.
Please make sure you read, understand and agree to these conditions before buying any gear.  

- All items ship from Japan.
- All the Items are shipped with EMS, Japan Post.
- Buyer must pay all packing and shipping charges and is responsible for all customs fees, taxes, and any other fees related to shipment.

Packing and shipping synthesizers requires time so please expect to wait 5 days to 1 week after payment before the synthesizer is shipped.
There might be some delays sometimes.

Please ask any and all questions before purchasing so you know exactly what to expect.
- All used items are as described.
-We check all the synthesizers before we put it on sale.
It may be possible sometime that some unnoticed problems occurs later due to their age and electronic nature, all used items are sold as is.
All sales are final, without warrantees or guarantees.
- We will not issue any refunds or accept returns, so please make sure that you really want the synthesizer you are going to buy.

In case of damaged synthesiser by the transport :
- Keep all the documentation that was provided by the courier company from the very beginning.
-When giving a description of the parcel or the content, try to give as
many details as possible, even if they might not seem relevant to you.
- Take many pictures to get as much detail as possible; don’t hesitate in filming a video.
- Until the claim is not approved, don’t discard any packaging or goods that arrived damaged.
-Notify the courier company right away, even if you didn’t have time to
fill in all the forms and gather all the supporting documents.
- Whenit arrives at the destination, the shipment must be inspected
thoroughly on the outside. The customer has to make sure that the
external condition of the package is in a good order.
- If the consignment is externally damaged, remember to fill a report, together
with the courier driver who handed over the parcel. - The form has to
include details about damages: broken cases, exposed content, opened
box, softened cardboard due to the presence of liquid, etc.
You agree not to hold us responsible for any shipping damage or losses.

- If you have a problem with any item you purchase from us, please contact us immediately so we can try to help.

Kind Regards.


This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.

Product Specs

Excellent (Used)
Sequential Circuits
Pro One
Analog Synths
Number of Keys
37 Keys

About The Seller

Vintage Standards
Joined Feb 2018
Tokyo, Japan


Accepted Payment Methods

  • PayPal

Shipping Policy

Ships from Tokyo, Japan to:

European Union
North America
Everywhere Else

L’article sera expédié en colis suivi dans les pays énumérés. Pour négocier les frais d’expédition vers d’autres destinations, merci de m’envoyer un message.

Tax Policies

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Return Policy

Return Window

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.

Accepted Payment Methods

Checkout via PayPal
Use a PayPal account or Credit Card

Vintage Standards

Tokyo, Japan
Joined: Feb 2018

Seller Achievements

Sequential Circuits Pro One Turbo CPU + Midi Serviced and Calibrated !
+ $126.56 Shipping