Made in France (Lens: Japan)

Used at the First Gymnasium of Athens, in Plaka.
"The solar microscope is in reality a magic lantern illuminated by the sun's rays; it serves to produce highly magnified images of very small objects. It is worked in a dark room"
Ref: http://physics.kenyon.edu/EarlyApparatus/Optics/Solar_Microscope/Solar_M...

The apparatus is probably made by Krüss company.

Probably made by Duboscq