Observation binoculars - Alpin 10x40 Grossfeld gummiert made in West Germany | - 1990-2000 - Optolyth現時出價€5738
Telescope on stand - Orion SkyView Pro 8" Equatorial Reflector Telescope - 2010-2020 - Orion現時出價€26039
Monocular compound microscope - Laboratory Microscope (no lenses) - 1900-1910 - 英國 - J Swift and Son開拍價€15
顯微鏡 - PMG 2 | "multipurpose metallurgical photomicrographic apparatus" - 1990-2000 - Olympus開拍價€20012