This level is marked "Georg Butenschon Bahrenfeld. B. Hamburg" and "G.B. Hbg" and "D.R.P. 36795." (Deutsches Reichspatent). Georg Butenschön was the proprietor of a workshop for scientific instruments located in Bahrenfeld, near Hamburg, and he showed his wares at the international exhibitions in Chicago (1893), Berlin (1896), and Paris (1900).
His basic pocket level was based on his German patent (#36795 dated 1886), which described an instrument in which the level vial, crosshairs, and distant objects were seen together through the eyepiece of the telescope. The lower, angle-measuring part of the instrument is based on another Butenschön patent (#76668 dated 1894).
This example has screws for horizontal and vertical fine adjustment. The horizontal circle is graduated to degrees and read by vernier to single minutes. The base of the instrument is a ball and socket joint that can be screwed into a piece of wood.
size of the box: 14.5x8.7x3cm. the tube is folding from 12 to 20 cm.
- Georg Butenschoen, Hamburg, Topographic level
- Manufacturer/ Brand
- Georg Butenschoen
- Model/ Name
- Estimated Period
- circa 1900
- Country of Origin
- Excellent condition - barely used with minimal signs of aging & wear