théodolite - Brass Surveying Level Instrument & Tribrach Base #1489 - 1850-1900 - Allemagne - R. Reiss, Liebenwerda
Observation binoculars - Patent 1016 -> Pocket Collapsible Aluminium Field Glasses - 1890s Folding Optics - 1850-1900 - Royaume-Uni - Aitchison and Co., London
Astronomical telescope - AstroMaster 130 Newtonian Reflector Telescope - Equatorial Mount EQ / Model 31051 - 2000-2010 - Celestron