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Citizen BU0088-51H Calendrier Moon Bracelet Watch - W38427
Ref. BU0088-51H
Sits in Citizen’s upper tier here — more premium than three quarters of the Citizen watches we list, which start at £139.
Price range £139 to £1,145 across 113 Citizen watches in stock.The Calendrier line is Citizen's answer to a particular kind of dressy complication watch: one that tracks the lunar cycle and carries a full triple calendar without demanding a weekly battery drawer raid. The Eco-Drive calibre 8730 at its centre converts any light source into charge and holds six months of reserve on a full tank, which means the moon phase display keeps turning accurately whether the watch is worn daily or rests in a drawer for half a year. At 41.8mm the case is broad enough to carry the layered dial without crowding it, and at 10.9mm it sits flatter than most watches carrying this much information — triple calendar sub-dials plus a moon phase aperture at six o'clock take up room, but the depth stays manageable under a cuff. The recessed crown tucks into the case profile rather than protruding, and the month sub-dial is corrected via a dedicated side pusher rather than through the crown, which keeps quick adjustments simple. The five-link bracelet matches the steel case without calling attention to itself, secured by a push-button deployment that opens cleanly one-handed.
- Reference
- BU0088-51H
- Brand
- Citizen
- Collection
- Calendrier
- Case size
- 41.8mm
- Case thickness
- 10.9mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Blue
- Crystal
- Sapphire
- Bezel
- Fixed
- Movement
- Solar
- Calibre
- 8730
- Functions
- Date, Moonphase
- Water resistance
- 100m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Deployant clasp
- Lume
- Luminous
- Retailer
- F.Hinds
Learn more about Citizen
The Shokosha Watch Research Institute began in Tokyo in 1918, and the Citizen name was given to its first pocket watch in 1924 by the then mayor of Tokyo, Shinpei Goto, who wanted a watch that would be available to ordinary citizens rather than only the wealthy. The company formally took the name in 1930.
That founding intention has held. Citizen is the largest watch manufacturer in the world by volume and is fully vertically integrated, making its own movements, cases, and electronic components.
Its most significant technology is Eco-Drive, introduced in 1976 and refined over decades. A photovoltaic cell beneath the dial converts any light — including indoor light — into stored energy, so the watch never needs a battery change. Citizen has sold well over a hundred million Eco-Drive watches, and the environmental argument is substantial: hundreds of millions of cells not discarded.
The company also produced the first analogue quartz watch with a titanium case in 1970, the first professional dive watch with an electronic depth sensor, and the Caliber 0100, an Eco-Drive movement accurate to within one second a year — the most accurate independent watch movement ever put into production.
Citizen owns Bulova, Frederique Constant, Alpina, and the movement manufacturer Miyota, whose calibres power a large share of the affordable mechanical watch market worldwide.
- 1918
- The Shokosha Watch Research Institute is founded.
- 1924
- The Citizen name is given to its first pocket watch.
- 1976
- Eco-Drive light-powered technology is introduced.
- 2018
- The Caliber 0100 achieves accuracy of one second a year.
Also in 4 collections
This watch appears in Back in Stock (3,635), Stainless Steel Watches (3,604), Blue Dial Watches (994) and Solar & Kinetic Watches (263).
Manufacturer’s guarantee
What the specifications mean
Strengths
- 100m water resistance covers swimming and watersports
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
- One of Citizen's more premium watches
Citizen BU0088-51H Calendrier Moon Bracelet alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | BU0088-51H | 37645A14TR | R8821108050 |
|---|---|---|---|
| Price | £469 | £395 | £389 |
| Case size | 41.8mm | 42mm | 42mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Solar | Solar | Solar |
| Strap | Stainless steel bracelet | Silicone strap | Mesh bracelet |
| This watch |
|
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Yes. At 100m it is rated for swimming and snorkelling, though not for diving.
Water resistance explainedWill the glass scratch?
Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.
Sapphire, mineral and acrylic comparedDoes it need a battery?
No. It charges from light, and the cell behind that is designed to last a decade or more.
Quartz, automatic and solar comparedIs it a men's or women's watch?
Listed as men's.
Cheapest place to buy
F.Hinds is the only UK retailer we track stocking this reference, so there is nothing to compare it against today.
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