Enamel all through a system that can take eighty hrs. It comes in 18-karat white gold with many shades of environmentally friendly or in 18-karat pink gold with blue hues, both accented with diamonds. The base metal of each is first sealed which has a transparent enamel after which layers https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/