British Iron-Age Coinages, TRINOVANTES, Uninscribed series, Unit, ‘Braughing Dragon’ type, boar left, annulet above, pellet-in-annulet below, rev. coiled serpent or dragon, 1.47g/5h (ABC 2282; BMC 389; VA 1948; S –). Nearly very fine, reverse better, extremely rare £600-800

This would appear to be the fourth recorded specimen. The first, found at Braughing, Hertfordshire, in 1867, is in the British Museum