This Seiko Prospex diver’s watch is made for underwater environments. One of the key features of SBDC063 is 200m water resistance suitable for diving. While some of the Prospex watches' movement is quartz battery, this one is Mechanical Automatic. Another remarkable point is that it has a "DIASIELD" processed case, which keeps itself free from scuffs as much as possible. The watch employs magnetic resistance structure to keep it's accuracy.