WOC-128 Electronic Organ + Sequencer - Extremely rare 1970's Japanese toy keyboard

The WOC-128 "Electronic Organ" is the very rare cousin of the much more common WOC-100 and WOC-125.

It's also the hottest looking of the three. That orange and black case is just -kisses fingers-.

Very little information is available on WOC, other than the occasional WOC-100 or WOC-125 unit showing up. WOC was apparently a short-lived Japanese toy company that had their toys manufactured in Hong Kong. There is literally no mentions of the WOC-128 anywhere that I could find, yet here it is, in all of its orange beauty.

The WOC-128 sports:

• 24 micro keys with toy action, they all work well with excellent contact
• Circuit based on the COP400 micro-controller (same as Apple Lisa)
• A built-in speaker
• A Volume control with On/Off
• A Vibrato On/Off switch
• A simple self-quantizing 27 steps non-looping sequencer circuit (Play Clear and Auto buttons).
• A Tempo adjustment for the sequence playback

It's approximately 28cm x 20cm x 10cm (11" x 8" x 4")

It operates on 4 x C-cell batteries, or 4 x AA batteries in C-cell adapters. It does not have a power adapter jack, or an audio out of any sort.

It is in Mint condition. There's one small area of grazing in the plastic on one side, it's only visible when reflecting a light at just the right angle. It was very hard to photograph but I got it, see photo. It looks like it could be from the production line, or simply aging plastic? There are also a couple small bubbles in the plastic lamination of the front plate. See photos.

The battery compartment is so clean, it looks practically unused. The battery door is present and unmolested, it latches perfectly.

I sadly do not have the original box.

It is fully functional and the monophonic sound has the charm of early simple electronic synthesizers. The sound has a little skip as part of the sequencer cycle, I suspect it's just a symptom of the lo-fi simple circuit. The speed of it can be adjusted with the tempo knob, so maybe it's meant as a metronome?

The sequencer is pretty neat, it constantly records the last 27 notes and their durations (to a point), you can insert pauses, and then play back the sequence faster or slower by adjusting the Tempo knob. It does some lofi self-quantizing, mostly as you would expect. The sequence does not automatically loop, you have to hit the Play button again. I'm a little puzzled as to what the Auto button does... Once pressed the notes played are neither heard or recorded and won't be until either the Play or Clear button is pressed. The Clear button clears the sequence.

It would be fairly simple to add a power adapter connector, an audio-out, and maybe smooth out the skip and make the sequence loop, to make this unit a usable musical instrument.

A true Holly Grail for any vintage Japanese musical toy collector!