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Citizen Eco-Drive technology with atomic timekeeping makes this the most accurate watch in the world. This perpetual calendar is radio-controlled in 5 time zones, boasts a 1-second chrono that measures up to 60 minutes, and power reserve. Shown in stainless steel two-tone and luminous accents under non-reflective sapphire crystal. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E650.

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Mens, Bracelet


Black, Luminous Hands and Markers, Power Reserve Indicator

Case Size (mm)


Case Material

Two-Tone, Stainless Steel


WR200/20Bar/666ft [Swimming, Showering & Snorkeling]


Anti-Reflective Sapphire Crystal


E650, Synchronized to Atomic Time Clock for Superior Accuracy, Atomic Timekeeping Technology with Synchronized Time Adjustment Available in 5 Time Zones, User Defined Time in 15 minutes Increments (A-TM), 1 Second Chronograph Measures up to 60 Minutes
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Perpetual Calendar, 12/24 Hour Time, Alarm, Power Reserve Indicator, Day/Date
Setting Instructions FOR CALIBER E650
Download PDF Watch Video
PCAT is rated 4.9 out of 5 by 97.
Rated 5 out of 5 by from Fabulous watch I absolutely LOVE this watch!!! My criteria for selecting this watch were: 1) Fully solar powered; 2) Accurate; 3) Waterproof; 4) Day; 5) Date; and finally, if possible, 6) Atomic self-setting (e.g. sets accurate time via radio reception of the US Bureau of Standards radio station WWVB.) This watch accomplishes ALL of that. I have accessed the NBS HF time & frequency stations WWV, and compared their minute tone to my second hand, and the watch always is exactly on the second. I wanted waterproof to some degree, and got 660ft/200M!!! Finally, it is VERY solidly made. I cannot recommend it highly enough.
Date published: 2017-01-11
Rated 5 out of 5 by from My 3rd One - I Have Purchused 3 as Gifts This By all Means is the best watch I have ever owned . I have owned different Models of Rolex and Have Held some very expensive watches and To Be Honest This is the best watch I have ever owned . It is The Most accurate on the planet and I have been delighted over the joy My gifts have gone to Others . This is a 1500.00 or More to say the least and The Previous one I gave as a gift has been worn for 5 Years and never a Issue . I am Pleased to write This as I am also please to be a Citizen watch Owner
Date published: 2018-08-21
Rated 4 out of 5 by from Great Watch I received this watch as a Christmas gift. Love it! The accuracy is amazing, as well as the looks. This is my "dress" watch, as I use a Navihawk AT for my daily-wear/work watch. I appreciate the fact that it never needs to be reset, because if the "Atomic" calibration feature. Once it is initially set, it stays accurate. Beautiful! In addition, the Eco-Drive system keeps the wstch going without a worry. The only drawback is that the display is not illuminated. The hands do glow for some time, if exposed to light, but a constant glow or backlight feature would make it absolutely fantastic.
Date published: 2017-01-23
Rated 5 out of 5 by from Nice Watch I bought this watch 6 weeks ago and found it has become my favorite watch. The styling allows me to wear it for most occasions. It keeps time very accurately. I am very pleased with my purchase. The only negative is that where I live in Central Florida, the signal from the atomic clock seems very weak. My watch has trouble getting a strong enough signal to adjust its time. Fortunately, it has a programmed time that is also very accurate, so it is not critical to have a strong signal. I would definitely recommend purchasing this watch.
Date published: 2017-01-15
Rated 5 out of 5 by from Excellent Quality, Features and Appearance. Have wanted an Eco-Drive for quite a while now. Finally received this one as a gift. Have very much enjoyed the quality and has all the features I was looking for: Solar power/Atomic Clock Updates/Alarm/Time Zones/Great Low Light Visibility & Water Resistance. For a watch with so many features, it is also surprisingly easy to read the dial. And of course, looks super nice as well. Also very pleased with the nightly atomic auto-updates; they perform quite well even when I don't leave it in an area that would be considered conducive to clear signal reception.
Date published: 2017-01-28
Rated 5 out of 5 by from Time for a Citizen I purchased this watch for my recent Anniversary. This two toned beauty stood out to me and I was hooked when i put it on my wrist. And oh the features! How about atomic time, solar powered battery, and a Perpetual calendar?! The watch is great with business attire or jeans and a T. And the price. Two words. Affordable luxury!
Date published: 2017-02-01
Rated 5 out of 5 by from Very reliable and comfortable to wear. This is my second time piece from Citizen and I'm looking to purchase two more.
Date published: 2017-01-11
Rated 5 out of 5 by from Beautiful Watch This was a Christmas gift from my wife and it's great! I had an older Citizen watch that also keeps great time; but this one is even better. I'm a techie kind of guy; but I don't need a watch to handle messaging or count calories - I just like to take a quick look to check the time. And the time is always correct with this watch. Yeah, it has an alarm and can tell me what day it is; but what makes it great are the style and accuracy. The watch band is beautiful and simple to open or close. Size adjustment is easy with full size and half size links. Don't worry about the clasp; my other Citizen has a similar clasp and works perfectly after ten years of daily use. You don't have to spend Rolex dollars to get that level of quality -. Just read what others have said too!
Date published: 2017-01-21
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Please tell me what kind of battery this clock uses, the code?

Asked by: FGDRomaniaEurope
I found out the type is CITIZEN Battery Clock 295-69 for caliber number E650. I bought this watch from second-hand and it had no battery at all. I found to buy the battery and go to the clock service. There I will find out whether or not my watch is functional. Thank you very much for your help, dear BrunDog.
Answered by: FGDRomaniaEurope
Date published: 2019-09-26

Could someone tell me what year this watch was manufactured in please. Thanks

Asked by: Luke169
Answered by: Joel
Date published: 2019-09-26

does the pcat at400452 come with titanium bracelet?

Asked by: sophie the cat
I believe the AT4004-52E has a stainless steel case and bracelet. There is a similar watch, the AT4010-50E, that has a titanium case and bracelet. It does not have the gold accents though, it is silver and black with some minimal blue accents.
Answered by: John5
Date published: 2018-07-18
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