Jewellery, Watches and Objects of Vertu

A sapphire and diamond coin set necklace, centred with an ancient coin, a Gordian III silver atoninianus, early 3rd century AD, mounted within a brilliant-cut diamond set surround, with collet set cabochon sapphire drop below, and similarly set connecting links to flexible flattened gaspipe-link back chain, clasp stamped ‘750’ and overstruck with number ‘73’, total diamond weight approximately 1.50 carats, length 43.5cm. £2,000-£2,500