The rotatable bezel is one of the most obvious elements for dive watches. Although it is just one of many parts, a “diving watch” without a rotating bezel does not count as a real dive watch. What makes the rotating bezel so important for dive watch? Oxygen supply is the most important thing to divers. However, it is hard to see how many oxygens left in the oxygen tank. Because of that, divers need use time to calculate the remaining oxygen. Normally, there are two using ways

In the early days of civilization, as the sun went down and the sundial was unusable for the night, a graduated candle was used to tell the time. The precision of this method of course suffered due to the inconsistent rate of candle burning. People started to find a way to solve the problem. Accounts from over 1,000 years ago mention the discovery of photoluminescent objects and paint in China and Japan. The Chinese would ground up rare photoluminescent jades to make these in