I believe this is a magazine designed to hold multiple glass plates, but I don't actually understand how it's supposed to work. There appears to be a rolling dark slide on the box which works, and each plate holder also has its own integrated dark slide. The holders are for 10 x 15 cm plates. There is no maker information that I can see, but the "fermé" label suggests it is of French origin. 

Be sure to check out my other sales. I can combine shipping to reduce your costs.
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About Camera Sanctuary:

Like you, I love cameras. I bring all manner of equipment into the Camera Sanctuary in the hope that I can place it in a new home. I handle everything from collector’s pieces to total beaters, Leica to Lomo, Alpa to Argus. You can buy from me secure in the following:

- My descriptions are honest. Some cameras have been babied, and some have been brutalized. There’s room in the world for both, but I won't try to sell one as the other.

- I won’t pretend I don’t know things.

- I’ll take back anything that doesn’t meet your expectations.

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