Raro microscopio tascabile antico J.J. Bausch Excelsior con custodia in legno pat. 1874
This is a J. J. Bausch patent Excelsior pocket and dissecting microscope. There are two slots in the lid for storing dissecting needles. The patent date ["J. J. BAUSCH, PAT. JUNE 9 "74"] is blind-stamped on the case.