A rare and early signature on this classic English rectangular protractor made in brass “Troughton London” who is John I or John II, active between 1756 to 1788, then 1788 to 1804.
The protractor measures 16,1×5,1 cm.
The condition is good excepted some trace of uses and very small chips on the edge and a old polishing.
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Established by Alexandre Piffault in 2014 and based in Paris at 5 rue de Condé, 75006, very close to Odéon, Le Zograscope specializes in antique and rare books in Science, Medicine and Technology, and rare antique instruments in the same fields. We have especially a strong interest in early and continental microscopy, early and special mathematical/drawing instruments, medical and surgical instrument, and rare technology.