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Tissot PRX 38mm Unisex Watch Grey
Ref. T1378074406100
Sits in Tissot’s upper tier here — more premium than three quarters of the Tissot watches we list, which start at £245.
Price range £245 to £1,875 across 310 Tissot watches in stock.The PRX traces back to a 1970s Tissot design shaped by Gérald Genta — the same hand behind the Royal Oak and the Nautilus — and the modern revival launched in 2021 has steadily expanded the line ever since. This 2025 titanium variant introduces both a new case size and a new material simultaneously, and the combination is not incidental: at 84 grams, it is meaningfully lighter than the stainless steel 40mm that preceded it, while the smaller footprint addresses a criticism that followed the original revival — that the 40mm wore too large over time without the 35mm feeling substantial enough. The integrated bracelet and fixed end links mean the watch reads larger on the wrist than 38mm implies, which is worth knowing before trying it on. The anthracite waffle dial sits against brushed titanium across both case and bracelet, building a coherent grey palette that the rose-tone hands interrupt — a point of genuine division among those who have worn it, given how well the rest of the watch holds together tonally. The movement underneath is built on the ETA 2824 platform with a Nivachron balance wheel, which resists both magnetic interference and temperature fluctuation, and an 80-hour reserve that makes weekly-winding habits unnecessary.
- Reference
- T1378074406100
- Brand
- Tissot
- Collection
- PRX
- Case size
- 38mm
- Case thickness
- 10.98mm
- Lug width
- 11mm
- Case material
- Titanium
- Case shape
- Tonneau
- Dial
- Grey
- Crystal
- Sapphire
- Movement
- Automatic
- Calibre
- ETA 2824
- Functions
- Date
- Water resistance
- 100m
- Bracelet / strap
- Titanium bracelet
- Strap colour
- Silver
- Clasp
- Deployant clasp
- Lume
- Super-LumiNova
- Retailer
- Mappin & Webb
Additional specifications
- Lug-to-lug
- 43.2mm
- Power reserve
- 80 hours
- Weight
- 84g
Learn more about Tissot
Charles-Félicien Tissot and his son Charles-Émile founded the company in Le Locle in 1853, assembling gold pocket watches and, unusually for the time, exporting aggressively — Russia became a major market within a decade.
Tissot's history is a sequence of firsts achieved through willingness to try materials and ideas the establishment considered unserious. The first mass-produced pocket watch with two time zones came in 1853. The first anti-magnetic wristwatch in 1930. The Astrolon of 1971 was the first watch with a movement made largely of injection-moulded plastic, and it worked. The RockWatch of 1985 used Alpine granite for the case, followed by watches in wood and mother-of-pearl.
The T-Touch of 1999 was the most significant: a tactile sapphire crystal allowing the wearer to access altimeter, barometer, compass, thermometer, and chronograph by touching the glass, years before touchscreens were commonplace.
Tissot merged with Omega in 1930 and both became founding members of what is now the Swatch Group. Its position in the group is volume and accessibility — Swiss mechanical and quartz watches at prices most people can reach, with the Powermatic 80 movement offering an eighty-hour reserve at entry level.
The company has held timekeeping roles across cycling, basketball, motorsport, and fencing.
- 1853
- Founded in Le Locle by Charles-Félicien and Charles-Émile Tissot.
- 1930
- Merges with Omega; releases the first anti-magnetic wristwatch.
- 1971
- The Astrolon uses a plastic movement.
- 1985
- The RockWatch is cased in Alpine granite.
- 1999
- The T-Touch introduces a tactile sapphire crystal.
Also in 6 collections
This watch appears in the Tissot PRX range (56), Back in Stock (4,007), Automatic Watches (1,417), Grey Dial Watches (222), Titanium Watches (135) and Tonneau & Cushion Watches (119).
Temporarily out of stock
Mappin & Webb is not currently taking orders for this reference. Last listed as available on 26 September 2026. Stock is checked nightly and this page updates when it returns.
What the specifications mean
A mechanical watch for everyday wear.
Strengths
- 100m water resistance covers swimming and watersports
- 38mm suits most wrists
- 43.2mm lug-to-lug keeps the 38mm case wearable
- Sapphire crystal, which resists scratching
- 80-hour reserve survives a weekend off the wrist
Tissot PRX alternatives
Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.
| Specification | T1378074406100 | 32031A23 | H70455160 |
|---|---|---|---|
| Price | £795 | £860 | £715 |
| Case size | 38mm | 38mm | 38mm |
| Water resistance | 100m | 100m | 100m |
| Movement | Automatic | Automatic | Automatic |
| Strap | Titanium bracelet | Leather strap | Stainless steel bracelet |
| Power reserve | 80 hours | 38 hours | 80 hours |
| This watch | Closely matched | Closely matched |
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 is automatic — the motion of your wrist winds it, and there is no cell to replace.
Quartz, automatic and solar comparedHow long does it run for when it's not worn?
About 80 hours fully wound — enough to sit off the wrist over a weekend and still be running.
What size strap does it take?
11mm. Any strap of that width will fit, and on most modern watches quick-release bars make the swap a two-minute job with no tools.
Will it fit my wrist?
Lug-to-lug is 43.2mm, which suits wrists from roughly 15cm (6 inches) upward.
Lug-to-lug decides fit more than case diameter does.
How to size a watch to your wristIs it a men's or women's watch?
Listed as unisex, and at this size it suits any wrist that takes the dimensions.
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