Epact: Horizontal Dial unsigned, late 16th century ?

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Horizontal Dial
Unsigned
Late 16th century ?; Dutch
Gilt copper; 110 x 72 x 85 mm

This brass dial is in the shape of a casket, with two supplementary compartments on the top. One of them contains the compass and the string gnomon dial, the other, with small flower-like perforations, can be opened from the inside but its function is not clear.

The dial has tables for converting time in different systems of hours and for calculation, and a calendar scale on the inside of the lid.

The box contained other parts which are now lost.

British Museum, London
Registration no. MLA 1871, 11-15.5

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Epact Scientific Instruments of Medieval and Renaissance Europe