Hertel & Reuss Stereo microscope STE 6, Kassel, Germany, early 1970s.
Hertel & Reuss Stereo microscope STE 6, Kassel, Germany, early 1970s.
"Watchmaker-microscope", binocular, stereo microscope, BM51-2, Lomo, USSR, 1960s. (metal)
Kyowa - Binocular - Microscope
Ruhmkorff Coil
Fennel Kassel level device-Germany-around 1960
Lambrecht's Polymeter, thermometer and hygrometer - Germany - around 1920