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Contact goniometer hinged at the 90 graduation



Pixii, Paris
Contact goniometer hinged at the 90° graduation (brass with silvered scale and steel, outside diameter 9.5 cm) in green velvet lined and red Morocco leather-covered case (12.5 cm wide) with two brass hooks. Signed (on the back side) "Pixii, Neveu et Sr. de Dumotiez | Rue du Jardinet, N 2 Paris", ca. 1820 

Collection: private collection









photographs © David Coffeen