17th century AD. A D-section silver hoop with flat elliptical bezel, pelleted border enclosing intaglio portrait bust of King Charles I flanked by 'CR' (Carolus Rex, King Charles"). See Scarisbrick, D. Rings: Jewelry of Power, Love and Loyalty, London, 2007, p.190-1 for other examples of rings with portraits of Charles I. 13 grams, 25mm overall, 17.55x19.92mm internal diameter (approximate size British O, USA 7, Europe 14.98, Japan 14) (1"). Property of a Wiltshire lady; formerly in a Cambridgeshire collection; acquired on the UK art market 1940s. Very fine condition.