Bausch & Lomb Petrographic Microscope in Case, typically used for examining geological samples like rocks and minerals features a rotating stage for analyzing crystal orientation and specialized polarizing filters, housed in its original wooden carrying case with polished brass finish and horseshoe base, comes with a key and nameplate "Seiller Institute Co, St. Louis, MO", 16" x 8.5" x 9.5", includes two wood cases with three brass objective lenses 1/12, 2/3, 1/6 and three eyepieces 1, 2, 1/2, good condition, see photos.
From the Dale Beeks Collection