Lot Essay
This is an example of the enamelling technique known as mail en rsille sur verre, which involves engraving a design on glass in low intaglio, lining the hollow reliefs thus formed with very thin gold foil, and, finally, filling them with powdered enamel that fuses at a lower temperature than the glass ground when fired (see J. Evans, A History of Jewellery, London, 1970, pp. 127-8; A. Somers Cocks and C. Truman, The Thyssen-Bornemisza Collection, Renaissance Jewels, Gold Boxes and Objets de Vertu, New York, 1984, pp. 92-95).