Vtg Casio SZ-1 Midi Sequencer Very Rare

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via this auction

This is the first post to feature an SZ-1 in the flesh. The only other post on the site to feature an SZ-1 is this one featuring a German ad.

Update via Florian in the comments: "The description says 'The unit powers up using batteries but is stuck in the Tempo function. No other buttons work.'. If you look at the rear panel picture, you see, that the clock switch is set to "ext". So this thing works assumingly."