"Stereoscope Patent 1872"
Interesting project to improve a stereoscope submitted on April 29, 1872 by Mr P. Pillet. with the Ministry of Agriculture and Commerce in order to complete a patent dated February 20, 1872. Torn into two pieces, glued back together in the center without loss of text. 21 x 31 cm 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato