Thanks to Hainbach for this tip! “The wonderful collection of vintage electronic instruments of the Harmonikamuseum Zwota. All these organs, synths, electric Pianos where produced in the “Musikwinkel” is he area in the Vogtland during GDR times. Most of the instruments are in working condition and I got ther kind permission to record with them, in a fitting old school style through nice Vermona amps onto tape. Definitely worth a visit, look on their website for opening times.”
The Harmonikamuseum Zwota can be found here.