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Inventory no. 35550 - Former Display Label

German VERTICAL DIAL
1586

Gilt copper. Signed, "Erasmus Habermel 86".

The gnomon, which projected horizontally from the centre of the dial, is missing. In use, the disc, engraved with hour-lines in a spiral and with a Zodiac scale round the edge, was first rotated until the appropriate point of the Zodiac scale lay opposite the line engraved in the centre of the bottom edge of the main plate.

On the back are a diagram of ordinary, Italian and Babylonian hours and a rotatable index, engraved with a Zodiac scale, which enable conversions to be effected between these three systems of counting the hours.

From the Michel Collection.

[57-84/42]
Billmeir Collection no. 42

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