The other area is part of the manual sync functions for the atomic clock synchronization. The time required to recharge varies slightly by model, so consult your manual or the Eco-Drive website (see References) for details. This model was an attempt to enter higher-priced markets (at a cost of around $1,000 USD). The Eco-Duo Drive technology failed to attract consumer interest and Citizen has since stopped making use of the unique movement. And then there is the world time function. Citizen has offered certain pieces in other countries with sapphire crystals that the US only saw mineral crystal versions of, but the World Perpetual AT watches all have sapphires crystals in the US. The images above show a lot of the range of styles, but not all of them.
Leave your watch in the sun until it begins running. Citizen Promaster Eco-Drive AP0440-14F Diver’s 200 m manufactured in 2000. The 7878 caliber Eco-Drive movement used in this watch can run for up to 180 days on its secondary power cell. They are based on the new H144 Eco-Drive quartz movement that has a lot more features that it might suggest at first glance. Sign up for our newsletter Join Our Email List & Get $25 Off your next order of $250 or more.
Four solar cell segments are just visible under the dial. However, if the watch does not receive enough light (if it is left in a box or drawer, for example), it will lose power and need recharging. Most steel models are about $500, while the titanium version is $650. I believe the World Time Perpetual watches should be out now, or very soon, and will be part of Citizen permanent collection for a while.