Enamel for the duration of a procedure that takes eighty hrs. It is available in 18-karat white gold with various shades of green or in eighteen-karat pink gold with blue hues, both accented with diamonds. The base metal of each is to start with sealed by using a transparent enamel https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/