"Optics View"
View Optics late 18th / early 19th century: "Perspective view of the City of Frankfurt and the Great Stone Bridge on the hand, Germany" unlocated Publisher; No mention 57 at the top right of the stage size 36 X 21cm, Marie-Louise of view 38 x 24cm, modern style magnifying glass 53 x 43 cm. 
Le Magazine de PROANTIC
TRÉSORS Magazine
Rivista Artiquariato