German Surveying Level
by Ertel & Sohn, c. 1850
Signed on the arc "Ertel & Sohn in München", silver scale with vernier, without magnifier, rack-and-pinion focusing, striding level, original lacquered brass, height 9
7/8 in., length of the telescope 15 in.
A rare and early German instrument.
Reserve: 300/US$ 405