Sundial ivory Charles Bloud 17th century

Ivory-Magnetic- azimuth-bloud-dial

Sundial with amazing ornamentation along edges, surrounding circular equinoctial dial, for use in spring and summer months, and along edges of central polar dial.Central metal rivet with hole for pin gnomon.
Pewter volvelle with perpetual calendar square and calendar scale to set the date for the magnetic azimuth elliptical hour sclae inside.Inscribed “Fait par Charles Bloud a Dieppe”on volvelle.

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