"Stereoskopische Prismenlupe L4" is the name of a stereo microscope model manufactured by Will Wetzlar. A very similar one (and compatible in terms of eyepieces and objectives) was sold under its own logo by CBS Beck Kassel.
Mikroskop Will Wetzlar Stereoskopische Prismenlupe L4 - Zdjęcie 2
Microscope Index: 216
Mikroskop Will Wetzlar Stereoskopische Prismenlupe L4
(Model mikroskopu: Mikroskop Will Wetzlar Stereoskopische Prismenlupe L4)