Carl Zeiss brass monocular microscope. Jena. c.1950.

This brass monocular microscope model from Carl Zeiss is extraordinarily rare. It was manufactured around 1950 under number 251,849. It has a modern design, although it is made of steel with a brass bath which gives it an antique look. It has a revolver with four lenses and a traditional focusing system. It is a robust and very heavy device weighing 4,500 grams.