ID this Banana Bike?

[wheelbender6]

This was recently posted on my local craigslist in Houston.
Can anybody ID this unique frame?
Seller said its a 3 spd but it looks like it has a derailleur.
https://houston.craigslist.org/bik/d/classic-banana-seat-muscle/6476346288.html

 

[Fv2]

European.
Head tube looks similar to Rapido, which I think we're made in Poland.