3rd Dec, 2025 11:00
Photographs, Optical Toys & Science
Swing Arm Protractor, Troughton & Simms
English, c.1840, engraved across the vernier arm'Troughton & Simms, London' with silver scale, gearing around the edge both arms with steel springs, in a shaped French polished mahogany case
Sold for £275
Result including buyers premium
English, c.1840, engraved across the vernier arm'Troughton & Simms, London' with silver scale, gearing around the edge both arms with steel springs, in a shaped French polished mahogany case
Auction: Photographs, Optical Toys & Science, 3rd Dec, 2025
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