In order for a Citizen Radio Controlled watch to be able to support multiple frequencies, the movement must be fitted with "Perfex Multi 3000". Currently, there are only 3 calibers in existence that support global atomic clock radio signal sync for the following world locales:
USA (WWVB)
Europe (Germany DCF-77)
Japan (JPY 40/60)
China (BPC)
The calibers in question are:
U600 Ana-digi used in the popular Skyhawk AT, Blue Angels Skyhawk, Promaster Carbon diver AT and the Japan market Attesa ATV 2834 series watches:
Skyhawk AT 3rd generation (Discontinued in Japan domestic market):
Blue Angels Edition Skyhawk AT:
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Japan market Citizen Attesa ATV 2834 series (Recently discontinued):
[img]http://fototime.com/%7BE6FB9B93-4158-4859-B405-2FC8C44135E1%7D/picture.JPG
Promaster Carbon AT diver:
The U600 was first introduced in 2007, has a 2.5 year total power reserve and can radio sync in the USA, Germany and Japan only. The U600 was recently discontinued in Japan and is being replaced by the updated U680 module.
Here are some U680 watches. Functionality is virtually the same as the old U600 with 2 key exceptions..... U680 watches can sync in China (In addition to all other supported locales) and has a 3.5 year total power reserve. The U680 is not currently offered by Citizen in the United States and can only be found in Japan market Citizens and some export versions of the Attesa U680 Jet Setter series.
Some examples....
Citizen Attesa ATV53-3022:
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Citizen Promaster Sky PMV65-2271:
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Citizen Attesa Sport (Recently discontinued in Japan and available in a few select export markets):
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Citizen in 2009 introduced the H610 "global" radio controlled analog caliber. The H610 is fitted with "Perfex Multi 3000" and can sync in USA, Germany, Japan and China. It features a 4.5 year power reserve, world time for 26 cities, 24 hour alarm, 1/5 sec 60 minute chronograph, perpetual calendar. The H610 is Citizen's current "Flagship" radio controlled caliber. It first debuted in the Summer of 2009 in Japan and in the fall of the same year for export markets.
Here are some notable Citizens that currently offer the H610 (And the H611) calibers:
Japan market Citizen Attesa ATD53-3011 "Direct Flight":
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Citizen Chrono-Time AT Limited Edition (US, Canada, UK, Ireland markets):
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Japan market Citizen Promaster Sky H610 PMD56-3022:
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Citizen Series 8 model 804 model CNS72-0041 (Japan market):
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Citizen Exceed EBS74-5104 (Japan market):
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Beyond the above calibers, at present, there are no others capable of syncronizing in north america. Citizen will release in the fall a new series of 3 hand analogue radio controlled calibers that will offer multi-band support. Very little is known about these. They could either be existing Japan market calibers that have been added Perfex Multi 3000 chip in their modules or brand new calibers specifically developed for export markets. We won't know any further details until around October-November timeframe.
Hope this helps.