Citizen Eco-Drive Perpetual Calendar Chronograph BL5435-58E Men's WatchThis Citizen Eco-Drive Perpetual Calendar Chronograph embraces sophistication effortlessly and makes it an ideal watch for everyday use. The black stainless steel construction imparts it the required and durability together with the mineral crystal. The Eco-Drive mechanism puts all your worries regarding battery run-outs at rest; just feed it some light and it shall run fine till infinity. Moreover, the watch is also an insurance against adjusting for odd months and leap years manually.