19th century ring dial
19th century universal ring dial
The ring dial is a sun dial suitable for various locations (latitudes) and times of the year. The dial is first set to the correct latitude. To aid, this (very sall) ring dial has the latitudes of Antwerpen, Vienna (Wien), Heidelberg and Bologna engraved on the rim of the dial. Setting the latitude is done by rotating the entire instrument relative to its hanging point. Next the hour ring is moved perpendicular to the latitude ring. Finally the month of the year is set using the sliding hole. By orienting the hole towards the sun, a small circle of light is created on the hour ring allowing the user to read the time. A true pocket watch from another era...
19th ring dial
Data sheet
- Year
- 19th century
- Material
- Brass
- Size instrument (Ø x h) in m
- 0.04
- weight instrument in kg
- 12.3 g
- country obtained from
- Netherlands
You might also like
8 other products in the same category:
19th century universal ring dial