A Troughton & Simms brass circular protractor in case, English, mid 19th century
signed Troughton & Simms, London, with rack and pinion movement and two sprung marking pins, in fitted mahogany case with trade label printed Troughton & Simms Opticians and Mathematical Instrument Makers to the Honorable Board of Ordnance London, the instrument 6in (15cm) diam.
Sold for
£687
inc. premium
Category: Collectibles / Scientific Instruments
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Scientific Instruments