This cup and its matching saucer were made using plique-à-jour, a technique that is similar to cloisonné enamel work whereby coloured enamels are fused into the spaces of a wire framework. Due the difficulty of fusing the coloured enamels into the spaces of the wire framework, plique-à-jour has a high failure rate. When successful, it produces a translucent effect similar to stained glass. The technique was popular in France in the 1860s and in Norway at the turn of the 20th century. This cup and saucer was made by Hellstrom & Co.