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![]() Ring Dial The hour numerals from 4 to 12 to 8 are engraved on the inside of the ring. There is a smaller ring for suspension. The instrument was formerly in the Franks Collection of finger rings (no. 1968), and is described in F. A. B. Ward, A Catalogue of European Scientific Instruments in the Department of Medieval and Later Antiquities of the British Museum (London, 1981), p. 62, no. 162. Ilaria Meliconi |