An armillary sphere by Fortin, 1780 circa

An armillary sphere by Fortin, 1780 circa

A Ptolemaic armillary sphere

by Jean Baptiste Fortin (Paris, 1750-1831)

signed “A Paris, chez le S. Fortin, rue de la Harpe”

Mounted on a turned ebonised stand

40 cm high, 27 cm diameter

Compara
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