Enamel through a system that normally takes 80 hours. It is available in eighteen-karat white gold with different shades of environmentally friendly or in 18-karat pink gold with blue hues, both of those accented with diamonds. The bottom metallic of each is 1st sealed which has a clear enamel then https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/