John E Earley
Tuol Sleng S21-0174
Nice looking camera. I also have a Zeiss Ikon 9x12, but I think mine is a different model. Have you used yours yet? I haven't used mine as I have others I have been more inclined to use lately.
This photo was taken with the 9x12 above. Instead of film I used Ilford RC polycontrast paper as a negative and after development I scanned on a V600 and then reversed it in PS Elements.

There is a lot of dust marks from both trimming the paper to size and from my dusty scanner,