Stereoscope in splendid condition. Type B-3, along with 13 old stereo photos. The exact age is unknown, at the end of the nineteenth century, around 1900. The lenses are in good condition and have no scratches. Manufactured by Chas. Beseler Co. N.Y. This information is on the inside and outside of the original box with the specification number 31095. Charles Beseler Company name comes from Charles Beseler, a businessman of the nineteenth century, who died in 1909, which manufactured and sold magic lanterns and stereoscope. The stereoscope comes from the estate of my late father, who was an avid collector of photography equipment (stereo). Measures Viewer / Glass 4,5x10,5