The Gwyneth NecklaceI believe this piece dates from the late 19th to early 20th century, a period when guilloch enamel reached its height of refinement during the Victorian and Edwardian eras. It certainly has touches of Art Nouveau influence! It was created by first engine turning the metal surfacetypically gold or silveron a rose or straight line lathe to carve precise, repeating geometric patterns. Translucent enamel was then carefully applied over the engraved metal