Copper-alloy, 3.24 grams, 22.17 mm diameter. Circa 17th century AD. A convex disc mount with a square-section mounting spike on the reverse, bearing the image of Charles I crowned facing with long hair, domed headgear, elliptical eyes and pointed beard. Reference: Read, B. Metal Artefacts of Antiquity, Langport, 2001 item 344. Good fine condition. Provenance: from an old English collection.