Citizen Calendrier BU2021-51L
Ref. BU2021-51L · Blue dial · In production
- Case44 mm
- Water res.100 m
- MovementSolar
- CrystalMineral
Citizen Calendrier BU2021-51L size, specs and price at a glance
The Citizen Calendrier BU2021-51L is 44 mm wide. Citizen does not publish its lug-to-lug length. It takes 23 mm straps and ships on a bracelet. Inside is the 8729 solar calibre, water resistant to 100 m. US list price: $550 when we last checked citizenwatch.com (3 Nov 2026).
Strap shopping? See our Citizen lug width chart.
Overview
The Citizen BU2021-51L is a dress watch from the Calendrier collection. It has a 44 mm stainless steel case. Citizen lists the dial as blue. Inside is a solar movement (calibre 8729). You also get 100 m water resistance, a mineral crystal and a bracelet.
Who it suits
- Wrists of roughly 17.7–19.6 cm (7.0–7.7 in), by our Watch Finder sizing guide
- Everyday wear including swimming
- Shirt cuffs and smarter dress codes
- Grab-and-go wear without winding or setting
Trade-offs
- Mineral crystal scratches more easily than sapphire
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 44 mm | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Lug-to-lug | Not published by Citizen | |
| Case material | Stainless steel | citizenwatch.com · 3 Nov 2026 |
| Crystal | Mineral | citizenwatch.com · 3 Nov 2026 |
| Water resistance | 100 m | citizenwatch.com · 3 Nov 2026 |
Dial
| Dial colour | Blue | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Date | Day/Date | citizenwatch.com · 3 Nov 2026 |
Movement
| Movement type | Solar | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Calibre | 8729 | citizenwatch.com · 3 Nov 2026 |
Strap / Bracelet
| Bracelet / strap | Bracelet | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Lug width | 23 mm | citizenwatch.com · 3 Nov 2026 |
Other
| US list price (MSRP) | $550 | citizenwatch.com · 3 Nov 2026 |
|---|---|---|
| Production status | In production | citizenwatch.com · 3 Nov 2026 |
| Style (our classification) | Dress | our classification |
Specs are summarised in our own words from the brand's product page. Each row links its source and the date we checked it. Fields we haven't verified are left out rather than guessed.
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Questions about the Citizen Calendrier BU2021-51L
How big is the Citizen Calendrier BU2021-51L?
The case is 44 mm wide.
What movement does the Citizen Calendrier BU2021-51L use?
It uses the 8729 calibre, a solar movement.
Can I swim with the Citizen Calendrier BU2021-51L?
Yes. It is rated to 100 m.
Does the Citizen Calendrier BU2021-51L have a date?
Yes, it shows the day and date.
How much is the Citizen Calendrier BU2021-51L?
The US list price was $550 on citizenwatch.com when we checked on 3 Nov 2026. Prices change, so check before you buy.
Will the Citizen Calendrier BU2021-51L fit my wrist?
By our sizing guide it sits best on wrists of about 17.7–19.6 cm (7.0–7.7 in). Use the fit checker on this page to test your own wrist.
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