I have a 4x5 Super D with a back that I can't figure out. It's a cross between a spring back or graflok and a Graflex back, I suppose. It takes graphic grafmatics and roll film holders, not Graflex ones. But, it lacks graflok hooks, and requires slotted holders. It has adjustable rails both top and bottom instead of a fixed rail like a Graflex back on the bottom. So, what is it?
Thanks,
Dan
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