P. Williamson and G. Davies, Medieval Ivory Carvings, 1200-1500, Part II, cat. Victoria and Albert Museum, London, 2014, pp. 666-669, no. 230
A Radiocarbon dating measurement report (ref. no. RCD-9081) prepared by J. Walker of RCD Lockinge, dated 30 May 2018, states that the ivory dates between AD 1456 and 1632 (95% confidence interval).
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