Research-based guide: The Wrist Guide Editorial checked official Tissot information on 7 September 2026. This is not a hands-on test; comfort and accuracy have not been measured. All links are official and 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 Tissot PRX Powermatic 80 is often approached as a single choice: do you like the design enough to buy it? A more useful approach separates three decisions. First choose the size. Then decide whether you want an automatic movement. Finally, assess the bracelet at a realistic fitted length. The 40mm T137.407.11.041.00 makes sense when all three answers point in the same direction.
Verified specifications and UK price
| Feature | Specification |
|---|---|
| Case width | 40mm |
| Thickness | 10.93mm |
| Published weight | 138g |
| Case and bracelet | 316L steel; quick-release bracelet |
| Crystal | Sapphire; antireflective coating underneath |
| Movement | Swiss automatic; Nivachron balance spring |
| Power reserve | Up to 80 hours |
| Water resistance | 10 bar |
| Dial and clasp | Blue, with date; butterfly clasp with push-buttons |
The official UK product page displayed £640 on 7 September 2026. The reference is important: PRX models with similar colours can differ in size and movement. The table describes this automatic steel-bracelet version, not every PRX.
Choose the size before the movement
A bracelet that flows directly into the case makes the whole watch’s footprint important. The number on the specification sheet cannot tell you where the first links will bend around your wrist. During a fitting, look from the side as well as above and check whether the watch stays centred when you move your hand.
Try the 35mm Powermatic 80 T137.207.11.041.00 at the same time. Tissot gives it the same 80-hour reserve and 10-bar rating, with a published weight of 104g. Its UK listing also displayed £640 on the check date. The smaller option therefore does not require abandoning the principal mechanical specification.
Choose 40mm because you prefer the resulting proportions and dial area, not because 35mm sounds insufficient on paper. Conversely, a smaller wrist does not impose one automatic answer. Wrist shape, preferred bracelet looseness and the visual weight you enjoy all influence the result. Compare them in a mirror at normal distance, rather than relying only on a close phone photograph.
What 80 hours changes
A fully wound 80-hour reserve can cover an ordinary weekend away from the wrist. For a weekday watch, that can reduce Monday-morning resetting. It is a maximum capacity, not a promise that any short period of wear will fill the reserve completely.
Ask yourself whether that convenience is relevant to your routine. Someone rotating watches every few days may appreciate it. Someone wearing the same watch daily might place more value on fit, while someone wearing it once a month will still encounter a stopped watch. Reserve length is useful, but it should solve a problem you actually have.
Do you want the automatic enough to pay for it?
The blue PRX quartz T137.410.11.041.00 was listed at £335 in the UK on 7 September 2026. Tissot specifies a 40mm case, 10.4mm thickness, sapphire crystal and 10-bar resistance. At those listed prices, choosing the automatic costs £305 more.
That is worth treating as a deliberate purchase of mechanical ownership, rather than an automatic upgrade in usefulness. If the case and bracelet are what drew you to the PRX, examine the quartz version seriously. If you enjoy the movement and exhibition back, the automatic has a clearer personal justification. Neither choice needs to be defended as the one that a collector is supposed to make.
Plan for fitting and servicing
Before paying, ask the retailer to explain bracelet sizing and demonstrate the quick-release attachment. Check compatibility before ordering another strap: a convenient release mechanism does not make every strap suitable for this case.
Tissot’s UK service page distinguishes minor work, partial maintenance and complete maintenance. The latter can include disassembly, lubrication and replacement of worn parts, or movement replacement where necessary. Obtain a current estimate for the work your watch needs rather than assuming every future visit has one fixed cost.
For a used PRX, request clear views of the bracelet, clasp, crystal and case edges, confirm the spare links, and establish the service history. An attractive asking price is less meaningful if getting the right fit immediately requires additional parts.
Buying verdict
The 40mm Powermatic 80 is a sound candidate when you want a substantial blue-dial bracelet watch and specifically enjoy an automatic movement. Its long reserve is useful for rotation. Make the final decision after comparing the 35mm automatic and 40mm quartz: the best PRX for you is the one whose size, routine and total cost work together.
