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Old world inspiration meets new world technology in this sporty retrograde perpetual calendar with alarm unlike any other. This stainless steel black ion plated watch with carbon fiber dial ring features dual time, month-day-date, 12/24 hour time, non-reflective crystal, 42mm screw-back case, 100M WR & foldover clasp with hidden double push button. Featuring our Eco-Drive technology – powered by light, any light. Never needs a battery. Caliber number E870.

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Case Size (mm)


Case Material

Black, Stainless Steel


WR100/10Bar/333ft [Swimming, Showering & Snorkeling]


Anti-Reflective Mineral Crystal


E870, Retrograde Perpetual Calendar, Dual Time (Second Time Zone), 12/24 Hour Time, Alarm
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Setting Instructions FOR CALIBER E870
Download PDF Watch Video
Brycen is rated 4.0 out of 5 by 4.
Rated 5 out of 5 by from Stunning watch! My local jewelry shop called me and said they ordered me this watch (since they know I like Citizen watches and the color black). I felt a little pressured into buying this, but am very grateful that I did. This watch is stunning! The features seem a little unnecessary, like the alarm - which is somewhat hard to hear and I would never depend on it to wake up. However, being an Eco-Drive, a very accurate time keeper, and looking amazing - this watch was a must have for me.
Date published: 2018-06-13
Rated 5 out of 5 by from My Reliable Watch I have had this watch for a long time, it's tough enough to wear daily, I wouldn't go to far on purpose but it's survived some rough days. From a military background I use the watch mostly for accurate time keeping and it works well. I've only adjusted the alignment once in four years of pretty consistent time changes,for time zones not an accuracy problem for keeping time, it's back to it's original set as if normal. I could not give it a fault for anything save the alarm, it's quiet but useful for routine alerts like checking something at a certain time, I wouldn't use it for a wakeup. It has some character on the clasp, but considering what it's been through and it's still in great shape I look at it as a positive. Lum is also surprisingly bright even today, that's exceptional. The layout of features is useful if you take the time to set it, it's not complicated once you start and I again have only ever needed to align it once. It's also spent some time in the drawer, I'm pretty much sold on Citizen from here on would consider an updated model or like upscale model later, a like model with more water resistance would be an interesting but it's here to stay.
Date published: 2018-11-06
Rated 5 out of 5 by from Perfect Watch and weight Not much to say other than its a stunning watch with all the features you could want
Date published: 2020-04-11
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What is the weight on this watch? My husband likes the heavier feel watch.

Asked by: Fiona
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