I just set up an eBay alert for an Elgam Carousel. You could really call this a vintage groovebox. It would go nicely with my Omnichord! Pretty machine.
“The CAROUSEL is an interesting analog preset rhythmbox with accompaniment made by Elgam, Italy. It has rhythm (like the Elgam Rhythm Match series), bass, chord and 3 arpeggiators! Rare, obscure and very interesting!” – AnalogAudio1
For more info: wikipedia.org/wiki/Groovebox