25 août 2015
A banded agate intaglio ring, by Nathaniel Marchant, 1772-88
A banded agate intaglio ring, by Nathaniel Marchant, 1772-88. Estimate £8,000 - 10,000 (€11,000 - 14,000). Photo: Bonhams. The collet-set oval banded agate plaque, carved to depict Castor and Pollux, the gallery engraved Castor & Pollux , intaglio signed...