One of the more popular of the Citizen moon phase eco drive watches, the 8651, can be found online at several sites for under $300 and a few for under $200 with much variation in price. Clearly, it pays to comparison shop for the Citizen moon phase eco drive watches.

The Citizen moon phase eco drive 8651 is a classic among watches. It features three subdials for month, for day and for the phase of the moon. Its hands and marks are luminous and of course, being an eco drive, it is powered by sun or light with a battery that never needs to be replaced. These Citizen moon phase eco drive watches come with five-year manufacturer's warranties. They can be ordered with a gold, white or blue face and with metal or leather bands.

The Citizen eco drive model AP1000-03L moon phase watch is designed to be worn by a man. Its indicator of the phases of the moon is on one of its three subdials at 7 o'clock. The day of the week displays at 10 o'clock on another subdial, while the third subdial shows the month at 4 o'clock. Its full charge offers a massive power reserve of 180 days. It has a buckle that folds with a push of one button, and an attractive blue leather watch strap.

This Citizen moon phase eco drive watch features an indicator of a low charge and advisory of time reset. It has a case with a screw back, and a mineral crystal that is both non reflective and scratch resistant.

These Citizen moon phase eco drive wrist watches are water resistant to a depth of over 300 feet.