Does the Calendrier need a battery?

No. Eco-Drive charges from light, so it avoids routine battery replacement. Keep it exposed to light, including indoor light, to stay charged.

The case is 44mm across. That is on the large side, so try it on if your wrist is small.

Is it safe to swim in?

It is water resistant, which covers splashes and handwashing. Citizen rates water resistance by model, so check the caseback marking before swimming.

What movement does it use?

It uses a quartz movement driven by Eco-Drive solar charging, not a mechanical movement.

Expect the watch, its bracelet and Citizen's documentation. A presentation box is standard, but confirm with the seller if gifting.

How does it compare to a Seiko solar chronograph?

Both run on light and skip battery changes. The Calendrier has a busier calendar-style dial and a larger 44mm case, while Seiko solar chronographs often come in smaller cases and cleaner layouts.

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This hour's deals

Citizen Calendrier BU2021-51L Eco-Drive Watch

−43%

Jewelry · Reeds Jewelers

Eco-Drive: no battery, no bother

Name: Citizen Calendrier BU2021-51L Eco-Drive Watch
Brand: Citizen
Price: 312.50 USD
Availability: InStock

Citizen Calendrier BU2021-51L Eco-Drive Watch

Citizen Calendrier Eco-Drive watch — a sharp everyday piece for the watch lover.

Deal score 4.8 · Good deal

$312.50$550.00 Reeds Jewelers's regular price

You save $237.50 at Reeds Jewelers

Checking it's still available…

Why it's a great deal

Elsewhere right now: Best Buy $330.18, Macy's $385.00, Paramount-jewelers-LLC $405.00, and 3 more (typical $408.75 across 6 stores)
Reeds Jewelers lists its regular price at $550.00: 43% off by its own figures
Rated 4.6 out of 5 by 149 buyers

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From Reeds Jewelers

Eco-Drive technology charges the timepiece in any light
Tracks 12hr and 24hr time across 24 different time zones
Date and day functions
Blue dial with silver accents
Japanese quartz movement
Water resistant to 100 meters

Materials: Stainless steel band and case
Fit: Case diameter 44mm; large case size (40mm - 44mm)
Guarantee: 5 year limited manufacturer's warranty
Returns: Easy, free returns
Shipping: Free standard shipping (7-10 business days) on orders anywhere in the Continental U.S.

Specs

Display: Analog
Chronograph: Yes
Water Resistant: Yes
Watch Movement: Quartz
Case Size: 44mm case
Style: Wrist
Scratch-Resistant: Yes
Case Shape: Round Case

About the Citizen Calendrier BU2021-51L Eco-Drive Watch

The Citizen Calendrier BU2021-51L is a men's analog chronograph with a 44mm round case and Citizen's Eco-Drive movement, which runs on light rather than a battery swap. It pairs a busy multi-dial face with a scratch-resistant crystal and water resistance, so it works as a daily wearer. Against rivals like Seiko solar chronographs, it stands out for the calendar-style dial and light charging, though its case is larger than many.

Best forBuyers who want a set-and-forget solar watchMen who like busy chronograph dialsDaily wear that can take splashesGift buyers wanting a known brand

Pros

Eco-Drive runs on light, so no routine battery changes
Chronograph plus calendar-style multi-dial layout
44mm case gives real wrist presence
Scratch-resistant crystal holds up to daily wear
Water resistant for handwashing and rain

Cons

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