English brass horary quadrant (6 1/4-inch radius), signed Joseph Richards with degree, unequal hour and trigonometric scales and vovelle (planispheric nocturna) on reverse side.
Details
- Category:
- Astronomy
- Object Number:
- 1984-1756
- Materials:
- brass
- Measurements:
-
overall: 5 x 160 x 160 mm
- type:
- horary quadrant and nocturnal
- credit:
- Christie's
