Classification Information
Zenith telescopes; Magnifying lenses; Biological microscopes; Telescopes; Microscopes; Monoculars; Reflecting telescopes; Binoculars; Magnifying glasses
Electrical and Scientific ApparatusZenith telescopes; Magnifying lenses; Biological microscopes; Telescopes; Microscopes; Monoculars; Reflecting telescopes; Binoculars; Magnifying glasses
Electrical and Scientific Apparatus