Equinoctial ring sundial
1719-1791
Universal equinoctial ring sundial
1651-1750
Universal equinoctial ring sundial
1651-1750
Universal equinoctial ring sundial, astronomical ring dial
1628-1724
Universal ring sundial
Universal equinoctial ring sundial, astronomical four ring dial
Universal equinoctial ring sundial signed "Cary London"
1789-1891
Universal equinoctial ring sundial
1751-1800
Astronomical circles with compass
1720
6" Universal Ring Dial
1656-1680
Brass equinoctial ring dial
1660
Universal ringdial brass (part silvered)
1701-1800
Universal Ring Dial, with three rings, 6" diam.
Universal equinoctial ring dial in silver
1801-1900
Universal equinoctial ring sundial signed (in Cyrillic) "A.S. Trindin
1701-1800
Pocket universal Ring Dial
Universal ring dial in small wooden case
Universal ring sundial, with mahogany case
1751-1800
Universal Ring Dial, 4 1/2" diam.
Universal Ring Dial, 2 3/4" diam., Johann Somer
1651-1700
3 1/2" Universal Ring Dial
1701-1800
Universal ring dial, by Smith, 6" brass
Astronomical Ring
1561
Portable Universal Ring sundial
1789-1891
Universal Ring Dial
1701-1800