![]() Unfortunately, the color of the instrument is perceptibly different from the original color. ![]() In 2016, it was newly lacquered and the screws were cleaned. Reliable ZEISS systems are used for manufacturing and assembly in high tech industries as well as exploration and processing of raw materials worldwide. ![]() The instrument was used extensively for teaching work until the end of the 1970s, especially for the measurement of polygonal and connecting nets. I got two Zeiss Jena, on is a Tessar 2.8/50mm and has 276830 serial number, mainly black, very sharp lens and compact, but not that bright. The coincidence vertical circle level, the screw microscope, and centring with a plain plummet are some of the shortcomings that have been overcome by further technological developments. Regarding its precision, the instrument is a second-order instrument, and the readings on the circles are determined to 2''. The cylindrical axis clamped to the detachable base, the ball bearings, the glass circles, the reading by means of a single microscope and the centric alidade toric level are just some of the revolutionary technological improvements. The instrument features a modern theodolite design patented by Heinrich Wild in 1921 with the Zeiss Th1 model and later perfected with the Wild T2 model.
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