I count exactly 1 lefty Kubicki Factor bass ever made. While this is not an actual Kubicki bass, Jerry Drozd is no bass slouch either. it's too bad he couldn't find a way to replicate the Xtended E string and detuning lever, but this certainly looks the part anyway. Very cool! Here's the English translation:
"Bass Jerzy drozd in perfect condition. One of the first pieces by maestro Jerzy, kubiki x factor type. Very comfortable to play and excellent sound"
https://reverb.com/item/76005503-jerzy- ... i-x-factor
