Also known as the Universal Equinoctial Ring Sundial, this instrument is used to determine Solar time. The ring dial, the armillary, or dials indicate the principal circles of the heavenly sphere: the meridian, the equator, and the solstice meridian.
Sundial. Portable universal (all latitudes) sundial. Universal Equatorial Solar Quadrant. One of most popular sundials of 17th
This beautiful replica is fashioned of brass and features a wooden base.
Astronomic Ring Dial