SN 261042 via this auction
"Arp 2600 with keyboard. Some slider caps missing and a few have broken ends but are movable. This Arp 2600 used to belong to Jackson 5 and has been on tour with them. You will see a "J5" engraving in the front! The fact that this used to belong to Jackson 5, probably adds some value to it!
It has seen very little usage since late 70s and mostly stored. Unit makes sound and most sliders seem to make a difference to the sound but I do not know too much about modular synthesis to make sure everything works. One thing I can guarantee (and you will see from watching my demo) is that all VCO's are functioning, including their frequency sliders, and tuning sliders, ADSR section is functioning, Sample & hold Sections is functioning, other than that I am no expert in this unit to tell if other functionality is as normal. It probably could use a rehab.
The keyboard is not the original and was purchased later. This is a later model of the keyboard (orange faced) and has more functionality than the first edition (grey faced). The keyboard works fine except one key towards the left end which does not trigger.
I have lost the door cover for the synth but the keyboard has the cover.
It seems there are a couple of minor mods on this synth for monitor outs. You will see the switches on the right top and right bottom."
