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Diptych Dial
Attributed to a Thomas Tucher
circa 1620; Nuremberg
Ivory and brass; 110 x 87 x 20 mm

This dial is made of three layers of ivory, two of them folding, thus constituting a double diptych dial.

One side is made as a common diptych dial, but the other has a brass folding universal equinoctial dial which can be adjusted for latitudes from 0 to 90?. On this side also the outer part of the folding leaf is covered with a gilt brass plate, with a pierced volvelle and aspectarium.

There are signs of engraving on the ivory underneath the plate, so it was probably put there to cover a previous engraving.

Museum of the History of Science, Oxford
Inventory number 73044

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Basic URL: http://www.mhs.ox.ac.uk/epact/catalogue.php?ENumber=86423

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