Mackenstein tabletop stereoscopic viewer. Ivory plaque bearing the words: “H. Mackenstein Patented Builder SGDG 15 rue des carmes Paris”
Mackenstein tabletop stereoscopic viewer. Ivory plaque bearing the words: “H. Mackenstein Patented Builder SGDG 15 rue des carmes Paris”. Late 19th century. The viewer has three interchangeable baskets that can each hold 50 6x13 views on glass or paper (double reflector mirror on top). Sight training is carried out by a chain system operated by two large side buttons. Beautifully made from cedar burl. Rack optical unit with achromatic lenses. Molded material cups and buttons. Ornate bronze carrying handles. 
Antiq-Photo establishment

Mackenstein tabletop stereoscopic viewer. Ivory plaque bearing the words: “H. Mackenstein Patented Builder SGDG 15 rue des carmes Paris”. Late 19th century. The viewer has three interchangeable baskets that can each hold 50 6x13 views on glass or paper (double reflector mirror on top). Sight training is carried out by a chain system operated by two large side buttons. Beautifully made from cedar burl. Rack optical unit with achromatic lenses. Molded material cups and buttons. Ornate bronze carrying handles.

Mackenstein tabletop stereoscopic viewer. Ivory plaque bearing the words: “H. Mackenstein Patented Builder SGDG 15 rue des carmes Paris”. Late 19th century. The viewer has three interchangeable baskets that can each hold 50 6x13 views on glass or paper (double reflector mirror on top). Sight training is carried out by a chain system operated by two large side buttons. Beautifully made from cedar burl. Rack optical unit with achromatic lenses. Molded material cups and buttons. Ornate bronze carrying handles.  Mackenstein tabletop stereoscopic viewer. Ivory plaque bearing the words: “H. Mackenstein Patented Builder SGDG 15 rue des carmes Paris”. Late 19th century. The viewer has three interchangeable baskets that can each hold 50 6x13 views on glass or paper (double reflector mirror on top