My No. 4 Folding Kodet Junior is back in the country again, but the customs are holding it because they don't understand what is going on. I'll call them monday and see if I can explain that the camera is on it way back to the owner after it has been restored.
I haven't been able to find a good answer to the question about the mysterious printing frame. I even asked Captain Kodak (ol' time Kodak collectors will know who it is), but he didn't know. What I could find is a hint in a 1896 Catalog (thanks to Charlie Kamerman's website). Here's a snippet view.
So maybe it is a 'special' but I really don't know.
At eBay there's a Eastman Pinhole camera for sale. Still 2 days to go. The camera was built from a kit that was sold, I believe, around 1930. Years ago I had an unassembled set in my collection, consisting of a big yellow envelope, a number if carton pieces, a pin to make the pinhole with and an instruction booklet. It was a nice and rare kit, but I have sold it because it didn't fit in my collection. Here is a pic of the camera on eBay.