This conversion is based on the 3 known photos of a one-of-a-kind experimental modification. Not much information exists on this conversion, but luckily I had the 3 photos to use for conversion reference. No photo showing the top, so it is a guess if the turret ring was covered or not, I chose to cover mine.
The conversion is based on Revell's Panzer IV kit (03119) with scratch-built turret ring cover, gas tanks, mount and cables.