Enamel through a process that will take eighty hours. It is available in eighteen-karat white gold with different shades of green or in eighteen-karat pink gold with blue hues, each accented with diamonds. The base metallic of each is 1st sealed using a transparent enamel and afterwards layers of opaque https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/