Research-based guide: The Wrist Guide Editorial checked official Citizen specifications and instructions on 7 September 2026. This is not a hands-on test. Source and purchase links are non-affiliate. The featured image is an AI composition based on the manufacturer’s product photograph, not a photograph taken during hands-on testing.
The blue Citizen Tsuyosa NJ0150-81L is worth considering if the bracelet is central to the watch you want. Its case and bracelet read as one design, rather than a conventional round watch with a strap attached afterwards. That gives it a clear identity, but it also changes how you should shop: the fit of the complete assembly matters more than a single diameter measurement.
Know which Tsuyosa you are buying
| Feature | Specification |
|---|---|
| Case diameter | 40mm |
| Case and bracelet | Stainless steel |
| Dial | Blue; date display |
| Crystal | Sapphire with date magnifier |
| Movement | Automatic |
| Power reserve | 40 hours on Citizen Italy’s specification |
| Water resistance | 5 bar |
| Published weight | 138g |
These figures come from Citizen Italy’s exact-reference listing, which displayed €299 on 7 September 2026. That is an Italian price in euros, not a UK price or a currency conversion. Use the reference to check your local dealer’s offer.
There is a small inconsistency in Citizen’s regional information: Citizen India identifies calibre 8210 and lists 42 hours of reserve. We use the more conservative 40-hour figure for planning, rather than treating either number as a measurement of a review sample. Neither figure suggests leaving it unworn from Friday evening until Monday morning and expecting it to remain running.
Start with the bracelet
Ask for the watch to be held at a realistic fitted length, rather than trying it with a loose display bracelet. Then examine where the first links turn down at each side of your wrist. A case that appears suitably sized from above can still feel awkward if the bracelet forms a wider, rigid shape around it.
Check the clasp underneath your wrist as carefully as the dial. Rest your hand on a desk, turn your palm up and move your wrist through the positions you use during work. These are buying checks, not claims that this particular bracelet has a problem. They are simply more revealing than judging a bracelet watch while holding your arm still in a shop mirror.
Keep any links removed during sizing. If you eventually sell the watch, give it to someone else or change your preferred fit, having the complete bracelet is useful. Buyers of a used example should establish what is included before comparing the asking price with a new watch.
Automatic ownership: the practical difference
The Tsuyosa is mechanically powered. It should be bought because you enjoy that sort of watch, with its setting and winding routine, rather than because the word automatic promises freedom from maintenance.
Citizen’s linked instruction manual covers manual and automatic winding, explains that position and environment affect mechanical accuracy, and recommends professional bracelet adjustment. It also warns against quick calendar correction between 9pm and 4:30am. Follow the instructions supplied with your particular watch when restarting or setting it.
For a first mechanical watch, spend a few days noting how often you wear it and whether it stops between outings. That tells you more about its suitability for your routine than chasing another owner’s reported daily rate. A desk-based job, several watches in rotation and occasional weekend wear are different use patterns.
Blue dial or date magnifier: decide in person
The colour makes this version easy to imagine with everyday clothes, but try reading the date at your normal viewing distance. The magnifier is a conspicuous part of the design. Some buyers will value the emphasis it gives the calendar; others will prefer an uninterrupted crystal. Neither preference needs to be justified by a technical ranking.
A good reason to choose this reference is that you like its complete appearance enough to wear it regularly. A poor reason is assuming you can easily turn it into an entirely different style with any spare strap. Check compatibility and availability before budgeting for alternatives.
The comparison to make
The Tissot PRX Powermatic 80 T137.407.11.041.00 is a useful comparison: another blue-dial steel bracelet watch, with an 80-hour published reserve and 10-bar rating. Those are meaningful differences for weekend rotation and specification, but they do not settle which case or bracelet suits your wrist. Try both with comparable sizing.
Buying verdict
Choose the NJ0150-81L if you want an approachable automatic with a bracelet-led design and are comfortable resetting it after time off the wrist. Before paying, confirm the blue reference, bracelet length, warranty coverage and local price. The official Citizen listing above provides a manufacturer route to dealer information. Fit and enjoyment should decide this purchase; a superficially better specification is little help if the watch stays in its box.
