I have some original "Ilford Special Lantern Plates" in b&w and bromide, I think they are made around 1900. The sizes are 8,5 x 17 cm and 4,3 x 10,6 cm, most of the pictures on the glasses are stereoscope. I would like to know more about them, but find it hard to get some information. What kind of viewer do I need to see them in 3 D? What wold be an adequate price if I would sell them somewhere, for example to a museum or a collector?