Epact Scientific Instruments of Medieval and Renaissance Europe

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Diptych Dial
Unsigned
Dated 1586; Flemish
Ivory and brass; 88 x 96 x 15 mm

This is the oldest of the six known Flemish diptych dials. All of them have very similar characteristics, among which a folding brass nocturnal on the outer face of the upper leaf and a lunar volvelle combined with an aspectarium.

The nocturnal sights bear the initials 'W' and 'D', and the extensive decoration consists of foliage and arabesques.

Museum of the History of Science, Oxford
Inventory number 64228

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