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The Eco-Drive Perpetual Calendar infuses a black dial and bezel with precise functionality. Features include black ion plated stainless steel case and bracelet, one-way rotating elapsed-time bezel, which reveals the hours, minutes, and seconds on luminous hands and markers, date indicator, 12/24 hour time, 1/20 second chronograph which measures up to 60 minutes, dual time, alarm and a superior water resistance of 330 feet (100 meters).
Summary of Features:
- Perpetual calendar
- 1/20 second chronograph measures up to 60 minutes
- 12/24 hour time
- Dual time
- Alarm
- Unidirectional rotating elapsed-time bezel
- Non-reflective mineral crystal
- Screw-back case
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Technical Details
- Ecologically friendly, light powered Eco-Drive Caliber E812 Japanese-quartz movement; Charges in natural sunlight or indoor light- Max power reserve: 120 - 270 days with Power Save; Low charge warning: 5 days; Charge time from stop state to max charge: Incandescent Light - 43 hrs, Outdoors, Cloudy (10,000 Lux) - 12 hrs, Outdoors, Sunny (100,000 Lux) - 4 hrs
- Durable, hardened non-reflective mineral crystal; Case diameter: 44 mm; 1/20 second chronograph measures up to 60 minutes; 12/24 hour time with 24-hour subdial; Dual-time function
- Black ion-plated stainless steel case and matching bracelet; Black dial; Perpetual-calendar function; Alarm function; Screw-back case; Unidirectional rotating bezel; Date function at 4 o'clock
- Water-resistant to 330 feet (100 M)
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By J Yendor (Portland, OR USA)
This is a good watch: solar powered, packed with functionality, and the black looks really good. You can read the pros of the watch in reviews of BL5180-57L (which uses the same movement), so I will not repeat them here. Instead, I will share with you my frustrations with the design.
1. Dual-time requires mode switching. There is no way to check time in the other zone with a quick glance; you have to switch modes (see point #2). If only we could make the 24-hour sub-dial display the hour in the second time zone (like Nighthawk) there would be no need for separate TME and L-TM modes! (Yes, this requires an additional motor, and I would have gladly paid for that. See also point #3.)
2. The features are not quickly accessible. You need to switch modes to access different features, and that can take literally minutes waiting for the hands to finish spinning. Minutes to change alarm settings? To see the second time zone? I don't have that kind of patience.
3. Chronograph maxes out at one hour. They could have used the 24-hour sub-dial to indicate chrono hours (requires the same additional motor as #1). It would not be too bad if the chronograph just keep running after rolling back to zero; I can remember which hour I started timing. Instead it stops and switches displayed time to TME (even if it was in L-TM, why?). Oh, and chronograph resets when you switch to either of the time modes (TME or L-TM).
4. Alarm only in TME time. Suppose you travel from US East Coast to Japan. No problem, you use TME for time at home and set L-TM time to local time in Japan (easily done by design). Now you want to wake up at 7am. You cannot set the alarm to 7am; you have to set it to the US East Coast time when it will be 7am in Japan. We use local time for our daily schedule, why should the alarm be different?
I still think that this is a nice watch. But it would be so much better if the designer at Citizen had used more common sense and made better use of the (currently quite useless) 24-hour sub-dial.

By Gary R. Elliott (San Jose, Ca.)
This is a great watch at a great price and it was delivered faster than I expected.
Buy Citizen Men's Eco-Drive Perpetual Calendar Black Ion-Plated Chronograph Watch #BL5295-55E Now
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