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Revamped and reinvented, the new sport styled CITIZEN Nighthawk is here to stay. Powered by any light, this watch never needs a battery. Featuring chronograph, 12/24-hour time and date in a granite ion-plated stainless steel case and bracelet with charcoal grey dial and vivid red accents. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number B620.

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Similar styles



Stainless Steel, Bracelet, Fold Over Clasp with Push Buttons


Gray, Luminous Hands and Markers

Case Size (mm)


Case Material

Gray, Stainless Steel


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


Mineral Crystal


B620, 1/5 Second Chronograph Measures up to 60 Minutes, 12/24 Hour Time, Date

Setting Instructions FOR CALIBER B620
Download PDF Watch Video
Nighthawk is rated 4.5 out of 5 by 11.
Rated 5 out of 5 by from Love it! This is my 3rd Citizen watch and it did not disappoint. Very happy. Have had many compliments on it.
Date published: 2017-09-19
Rated 3 out of 5 by from Can’t read in the dark Looks great. Feels great. Fits well. But impossible to read in the dark or near dark
Date published: 2017-12-13
Rated 4 out of 5 by from Functionalty I bought this watch a week ago and am not 100% pleased. I like the way it looks, but is difficult to read at night. The dials and the numbers are not illuminated making the Time almost unreadable.
Date published: 2017-11-12
Rated 3 out of 5 by from Watch hands blend too much with face! I love the look of the watch, but have a hard time telling the time because the watch hands blend too much with the face. Hands should have red color like the stopwatch hand. Does not have a night time glow either.
Date published: 2018-01-02
Rated 5 out of 5 by from Love this watch! Not my first, nor will it be my last Citizen watch. Beautiful watch with the style, fit, finish, and precision to be expected from Citizen. I've received many compliments on it, and it's a great addition to my collection.
Date published: 2018-04-06
Rated 4 out of 5 by from Great watch I've had nothing but compliments on the look of this watch. Hard to read at night. But this is the quality I've come to expect from citizen. Thanks!
Date published: 2017-12-16
Rated 5 out of 5 by from Curts Wasn’t the watch I thought. Didn’t like it and returned it. Bought a watch from Citizen that better suited my needs. Great quality but not what I wanted. Have 2 other Citizen watches I love
Date published: 2017-11-18
Rated 5 out of 5 by from GORGEOUS WATCH Bought this very recently and am very pleased with it. Everyone comments on how nice it is. This is my second Citizen watch among many other brands. I will wear this regularly. I hope the finish stays, as it's simply fantastic looking.
Date published: 2018-04-27
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What is the center bottom dial for on this watch? I don't see anything in the description about it.

Asked by: Mike15y
The bottom dial on the model watch mentioned is where the second hand for the watch is located. The long skinny sweep red hand is the chronograph second hand. If you have any other questions and wish to speak to someone directly, please contact our customer care department. Our Customer Care Department may be reached at (800) 321-1023, Monday through Friday, 6:00am to 5:00pm Pacific Time.
Answered by: CitizenCS
Date published: 2018-07-25

I just had a couple questions about registering my watch. Where do I find the serial # and caliber of my watch? The model # is CA4377-53H. Thank you

Asked by: Jordan92
the best answer i can give is you google how to find it on you watch, it will come up, i have had to do that for 2 of my watches i have............ i think i also googled how to set the time and there will be a video and will show you where to find it
Answered by: Curts
Date published: 2018-06-19
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