Universal Ring Dial, 4" diam., with plate to secure greater accuracy, unsigned, England Universal Ring Dial
Universal ring dial, brass, 3 5/8-inch outside diameter, Europe, 1701-1800. Universal Ring Dial 1701-1800
Astronomical Ring, brass, nearly 5-inches diameter; inscribed: "Nepos Gemae F. Louany fecit 1561" (indicating that it was made by one of the Arsenius brothers) with modern suspension ring Astronomical Ring 1561
Portable Universal Ring sundial, by William Cary, London, with wood and cord suspension, in fitted wooden case Portable Universal Ring sundial 1789-1891