I've extended my collection with an interesting set of 50 glass 45x107 stereoviews and a simple stereoscope. The stereoviews are published by the Service des Ventes de l'U.N.C. (SDV).
Last month I've acquired my second cabinet stereoscope. It's a beautiful late 19th century deluxe rotary viewer, built by the French manufacturer Mattey. This multiple-view device supports paper and glass stereo views in both 45x107 and 6x30 formats.
My latest acquisition is an antique cabinet stereoscope for viewing 45x107 glass stereoviews. The stereoscope dates from the beginning of the 20th century and is built by Hemdé. I wanted to know everything about the device and its maker. A product catalogue and online archives revealed some information about its past.