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Inventory no. 50769 - Former Display Label

9
Gothic (Quatrefoil type) ASTROLABE
c.1450

Unsigned and undated. Brass.

On the back are a zodiac/calendar scale (0° Aries = 11 March; eccentric type), a diagram of unequal hours, a shadow-square and a scale of degrees. The alidade is plain and the sights are hinged; there is a label over the rete.

Formerly in the Michel Collection

[57-84/16]
Billmeir Collection

Rete for 21 fixed stars, but the stars are not named. The pattern of the tracery of the rete includes four quatrefoils and the star-pointers derive from the 'wavy-flame' type. In the zodiac/calendar scale, the month May, is written 'MADIVS'. 2 plates for latitudes {??}6°, 41°; 45° and 49°, engraved with azimuths as well as almucantars, and with lines of unequal hours. A third plate may be missing.

The alidade is plain and the sights are hinged; there is label over the rete.

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