Enamel through a method that requires 80 hrs. It comes in eighteen-karat white gold with several shades of green or in eighteen-karat pink gold with blue hues, each accented with diamonds. The bottom metal of every is initial sealed that has a clear enamel after which levels of opaque white https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/