That Super Ikonta is beautiful! I've been looking at Zeiss Ikon folders myself, particularly 6x9s. Then I stumbled on a 6x11 on etsy from 1932 for real cheap and it looked in great shape and had the top lens (12cm f4.5 Tessar) so it got me wondering... Ahh, it's made for 116 film, which at 2 3/4" wide is a quarter inch wider than 120.
The last pic shows the modified 120 reels -- tops trimmed with nail clippers so they fit in the reel wells, and spacers from Camerahack via the FFP store. Here is a link to instructions on home-made reel spacers and also creating a mask (116 and 616 are the same size film -- I think the only difference is in the diameter of the reel core).
http://kodak.3106.net/index.php?p=516Since the 120 film is too narrow to ride the rails, the pressure plate doesn't really work along the top and bottom edges, theoretically affecting focus. I did some test shots and the lens seems pretty sharp, but I can see it could be even sharper if I install a mask. The instructions in the linked doc are for a Kodak, not a Zeiss Ikon, and there are some differences that make his instructions not directly transferable, but I have an idea of what to do and he pointed me to the material to use for the mask -- black styrene sheets.
Anyway, the camera is great, bellows are in great shape, the lens was a little dirty but looks in great shape, the shutter speeds are slow less than 2/3 of a stop, no oil on the aperture or shutter blades. I thought I jammed up the shutter permanently by testing the self-timer but was able to prod it through (will never try that again). Test pics here
http://www.filmwasters.com/forum/index.php?topic=9956.msg134168#msg134168To focus, I carry my Kiev rangefinder and transfer the focus distance from it to the Ikonta.