"Optics View"
View Optics late 18th / early 19th century: "Perspective view of Mount of the Holy Virgin said Frauen Berg in Frankfurt am Mein where we see the Metropolitan Church dedicated in his honor" in Paris, at Rue J. Chéreau St Jacques above the Fontaine St Severin with two columns (No. 257) Dimension of the stage 40 X 24cm, Marie-Louise of view 43 x 27,5cm, modern style magnifying glass 53 x 43 cm. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato