I have several 9x12 single sheet film holders (all metal of German orgin) that fit a very early model Linhof Super Technika III (the type without a revolving back). I also have 9x12 film that measures about 2 mm less than the nominal size.
I cannot figure out how to insert the film into the holder.
The little 'gutters' that secure the film are on all four sides.
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