It is remarkably easy to find the Weltur film advance knob when reaching for the focus knob. There is, unfortunately, no way to wind the film back outside of a black bag.
So the right view of the flowering tree overlaps the left. I scanned the right and left frames individually and together.
I adjusted the curves in the overlap to match the sides but that still left the boundaries. I tried leaving them as-is and with dividing lines. What do you think?
Welta Weltur c1935
Carl Zeiss Tessar 75/2.8, Compur-Rapid Shutter
Epson Perfection V500 Photo scanner