I have three LN Dry Plate DDS 3-1/4 X 5-1/4" Pat. 1894 Eastman Kodak

And finally got a camera to match, it needs some work, it can be fixed by me

I would assume Dry Plate sizing came from Wet Plate sizes

I have been collecting film and plate holders for a while

How long would one of these last, the septum is paper board, perhaps when that goes, I can make it one sided with a plastic septum

I may not use these, but have assorted others just like it in different sizes

I have NOT seen any old wet plate holders FS or in odd sizes

Dry Plate Holder 1 by TIN CAN COLLEGE, on Flickr