Ah, the Sennheiser VSM201. Just a $30K vocoder. Seems like it was $25K when it released in 1977, but also didn't get to sell even 50 units, so quite rare.
I guess you can get similar results with cheaper hardware, but if you have money and you have it around... ¯\_(ツ)_/¯
I guess you can get similar results with cheaper hardware, but if you have money and you have it around... ¯\_(ツ)_/¯