Two Zeiss Ikon hand-held stereoscopes for the 45x107 and 6x13 formats. The magnifying lenses of these stereo viewers offer a wonderful viewing experience. These are the workhorses I use to view my stereoview collection.
The Carte de Visite, abbreviated CdV, was a type of small photograph which was patented in 1854 by the French photographer André Adolphe Eugène Disdéri. It was usually made of an albumen print, which was a thin paper photograph that was mounted on a thicker paper card. The size of the photo was usually around 6 x 9cm and they could be produced inexpensively.
The Heag series of folding cameras were produced between 1900 and 1926 by Ernemann from Dresden. The abbreviation Heag stands for Heinrich Ernemann Actien Gesellschaft.
I found 21 glass plate negatives with stereo images of the First World War. The slides provide an interesting insight into the mobilisation of the French army during the first weeks of the conflict.
The Vérascope was a compact stereo camera that was introduced in 1893 by Jules Richard. It was the best selling stereo camera of its time and the production of various models continued well into the 1950s.