Full-Circle Protractor by Gottfried Hohnbaum, c. 1840
Similar Upcoming Sales
French Copernican heliocentric Armillary Sphere DelamarcheFrench Copernican Armillary Sphere Brass Charles Dien 1830Reflecting Circle by Pistor & Martins, Berlin, c. 1850/60Mar 14, 2026Completely Preserved Mirror Sextant from the Brander Workshop in Augsburg, c. 1783Mar 14, 2026WESTERN ELECTRIC TANGENT GALVANOMETER NO. 26 Late 19th Centuy Height 9?.Mar 12, 2026BRASS AND EBONY SEXTANT 19th Century Length 16". Width 13.75".5 days LeftJ.H. BUNNELL GALVANOMETER New York, Late 19th Century Height 3.5". Diameter 8".Mar 12, 2026French Graphometer by Lasnier, c. 1740Mar 14, 2026German Portable Sundial, c. 1750–80Mar 14, 2026An 18K gold key wind open face pocket watch London Hallmark for 1806Cover Glass Thickness Gauge by Mühle from Glashütte, c. 1880–90Mar 14, 2026ELLIOTT BROS. HELMHOLTZ-TYPE TANGENT GALVANOMETER London, Late 19th Century Height 16.5". WidthMar 12, 2026Early German Graphometer, c. 1640Mar 14, 2026F.E. BECKER & CO. EARTH INDUCTION DEVICE London, 19th Century Height 17.5". Width 20". Depth 8.5".Mar 12, 2026CASED JOHN BROWNING BRASS SPECTROSCOPE London, Mid- to Late 19th Century Scope height 12.5". CaseMar 12, 2026R. Rigby, Charing Cross. An 18K gold key wind open face pocket watch London Hallmark for 1825 
