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.
Estimate: € 700/1.200
US$ 950/1,600
Reserve: € 300/US$ 405
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