A fine and rare early 18th-Century silver ring dial,

A fine and rare early 18th-Century silver ring dial,
unsigned, but bearing the [?]owner's incscription Trier 49 Gr. 50 M 1709 P.M. on the inside surface, the outer surface unmarked, the inner surface with hour scale and calendar scale with notched edges bearing initials for the days of the month and sigils for the houses of the Zodiac -- 2¼in. (5.4cm.) diameter

See Colour Illustration and Detail