Expedition Pioneer TW2Y87400 Timex's dive-ready field watch in steel

What is new about the Expedition Pioneer Automatic?

The Expedition Pioneer arrived earlier in 2026 as a titanium automatic with a diver's bezel, a sand-blasted case and a 200 m rating. The TW2Y87400 is the steel version, added to Timex's UK store in August 2026. Timex sells it in two forms: this black dial on a steel bracelet at a £380 RRP, and a blue dial on brown leather (TW2Y87500) at £360.

Three things change against the titanium model. The case is now stainless steel with brushed and polished surfaces rather than all-over blasting. The movement is a Miyota 8215 rather than the Seiko NH35 that Two Broke Watch Snobs reports in the titanium time-and-date model. And the top ring has a different scale: a 60-minute count-up track numbered every five minutes, where the titanium watch has a classic diver's insert with a lume pip. A yellow seconds hand, borrowed from the Pioneer GMT, is the one splash of colour on the dial.

How big is it, and how will it wear?

Timex lists a 41 mm case, a 48 mm lug-to-lug length and a 14 mm case height, with 20 mm lugs. Those first two numbers are friendly: 48 mm from lug tip to lug tip should sit comfortably on wrists from roughly 16.5 cm upwards, and the squared-off, faceted lugs carried over from the titanium watch keep the outline compact.

The figure to think about is the 14 mm height. That is thick for a 41 mm field watch, partly because of the sapphire exhibition caseback, and it will make the watch harder to slide under a tight shirt cuff. Timex also quotes a weight of 166.15 g on the bracelet. That is a substantial watch, and noticeably heavier than the titanium version. Timex itself pitches the steel model as having "a more substantial presence on the wrist", so this is the intent rather than an accident. If you want a light watch for long days outdoors, the titanium model is the better fit.

What movement does it use, and how accurate is it?

Inside is the Miyota 8215, a Japanese automatic with 21 jewels, hacking seconds and a date. Timex quotes a power reserve of about 42 hours and an accuracy tolerance of -20 to +40 seconds a day. That tolerance is wide, and typical for this class of movement: most examples run well inside it, but Timex only promises the published range.

The 8215 does not hand-wind as smoothly as some rivals, and its seconds hand moves with a 21,600 beat-per-hour sweep, so it ticks a little more visibly than a higher-beat movement. Two Broke Watch Snobs calls the change from the NH35 "mostly a lateral move", which is a fair reading of the published numbers: similar beat rate, similar reserve.

How well is it built?

The specification is strong for the money. There is sapphire over the dial with an anti-glare coating and a second sapphire window in the caseback. Water resistance is 200 m, which Timex rates as suitable for swimming, snorkelling and recreational scuba diving. The hands and applied indices carry luminous fill, and the steel bracelet closes with a deployant clasp.

One detail is muddled in Timex's own material. The UK product description calls the top ring unidirectional and ratcheting, while Two Broke Watch Snobs notes that Timex's US specification lists it as bidirectional. Either way it is a timing ring rather than a dive bezel with a lume pip, so treat it as a handy elapsed-time scale rather than a dive instrument.

Is it good value against its rivals?

The closest rival is the Seiko 5 Sports Field HDB009K1 at a £350 RRP, an automatic field watch with a compass bezel. The Timex costs £30 more but adds sapphire front and back and a 200 m rating, which is a meaningful upgrade in build.

The awkward comparison is inside Timex's own range. The Expedition Pioneer Titanium Automatic costs £380 on a rubber strap and £475 on a titanium bracelet on Timex's UK store. So £380 buys you either this steel watch on a bracelet or the lighter titanium watch on rubber. If you prefer bracelets and polished edges, the steel model is the better deal. If weight matters more, the titanium one is the same money.

What is the catch?

Weight and thickness. At 166 g and 14 mm, this is a chunky watch for a 41 mm case, and it gives up the lightness that made the titanium Pioneer appealing. The movement's published accuracy range is also generous, and the top ring is a timing scale rather than a proper diver's bezel. It is too new for meaningful owner feedback, so long-term reports on the bracelet and clasp are not yet available.

“Steel brings polish and heft; titanium brings lightness. At £380, Timex makes you choose.”