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Citizen NJ0150-81X Men's Watch
Ref. TR_NJ0150-81X
The Tsuyosa — the name means "strength" in Japanese — is Citizen's attempt to plant an automatic in the middle of the market without apology. The Caliber 8210 inside is a genuine in-house movement, 21 jewels, 40 hours of reserve, visible through a exhibition caseback that makes the point quietly rather than noisily. At 40mm the case is mainstream in size but the integrated bracelet pulls the whole thing together so that it reads as a considered object rather than an assembled one. The sunray green dial shifts as the light moves across it, going from deep forest to something almost jade-depending on the angle, which keeps it from sitting flat on the wrist the way a solid-colour dial can. The exhibition caseback is worth a moment on the wrist — the rotor spins freely visible, and for a watch at this level that is genuinely useful as a reminder to keep it moving. The deployant clasp adjusts without tools, which on an integrated bracelet matters more than it sounds.
- Reference
- TR_NJ0150-81X
- Brand
- Citizen
- Case size
- 40mm
- Case material
- Stainless steel
- Case shape
- Round
- Dial
- Green
- Crystal
- Sapphire
- Movement
- Automatic
- Functions
- Date
- Water resistance
- 50m
- Bracelet / strap
- Stainless steel bracelet
- Strap colour
- Silver
- Clasp
- Deployant clasp
- Lume
- Luminous
- Retailer
- Watch Home
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.
No longer listed
No retailer we track is currently selling this reference. The specifications below are kept for reference, and the page returns to normal if it is listed again.
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 40mm suits most wrists
- Sapphire crystal, which resists scratching
- Luminous hands and markers for low light
Worth knowing
- 50m suits rain and handwashing, not swimming
Citizen NJ0150-81X alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | TR_NJ0150-81X | RGS10081/04 | 96A190 |
|---|---|---|---|
| Price | £189 | £189 | £170 |
| Case size | 40mm | 40mm | 40mm |
| Water resistance | 50m | 50m | 30m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Stainless steel bracelet | Leather strap | Stainless steel bracelet |
| This watch | Closely matched |
|
Your new watch
Frequently asked questions, and things you should know about this watch
Can I swim with it?
Showering yes, swimming no. 50m covers splashes and brief immersion, but a swimming stroke generates well above the pressure that figure describes.
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 is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedIs it a men's or women's watch?
Listed as men's, though at 40mm it sits in the range that suits anyone.
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