Siel Synthesizer DK70 with Stage Set in Original Box

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via this auction

The "Stage Set" appears to be the keytar hand grip & shoulder strap.

"This is an oddball Italian synth made by Siel to compete with the SH101 and Korg Poly 800 -it sounded pretty good, check it out on youtube!! It uses memory cartridges to expand patch memory - same cartridges as some sort of Suzuki synth IIRC -never seen one for sale. I played this for about a year then a few months ago I plugged it in and the power light flashed as though the batteries were low, and it wouldn't play. Sadly, this was around the same time I found an NOS never used mod grip. I suspect its a capacitor or something in the power supply, but can't be sure. Might just be a loose wire. Sold as-is, as pictured, no returns."