English, circa 1500, Iconographic ring with Saint Christopher. Estimate  3,000 — 5,000 GBP. Lot sold 6,250   GBP. Photo Sotheby's.

gold, with traces of niello, 23mm.,  7/8 in., ring size: P

Note: The saints on this type of devotional rings seem to derive from small scale woodcuts of the late 15th century such as those included in the exhibition Voyager Au Moyen Age at the Musée de Cluny (op.cit.) For a comparable representation of Saint Christopher on an iconographic ring see inv. no. 689-1871 in the Victoria and Albert Museum and for the hatched chevrons on the shoulders no. 691-1871 in the same museum. 

RELATED LITERATURE
M. Bromand et al., Voyager au Moyen Age, exh. cat. Musée national du Moyen Age. Musée de Cluny, Paris, 2014, p. 146

Sotheby's. Old Master Sculpture and Works of Art, London, 09 Jul 2015