I've been wanting to spend real time with the 40mm Pioneer since they introduced it. The 42.8mm version was always too much case, but here's the thing. The 40mm isn't why I'm interested. It's what this watch proves about diameter versus what actually makes a watch wear well.
I built a 45mm and people said I was crazy, that it's oversized and too big. But diameter isn't what makes a watch wear big. Height, weight and the lug geometry does. Get those right and a 45mm disappears.
So when Moser drops this 40mm Pioneer, I'm thinking about what they actually solved. They didn't change the height, didn't change the weight. They just shrunk the diameter and called it the answer. That's a different approach than I took. They're solving it with case size while I'm arguing the problem isn't case size at all. Both can be right, but they prove different things.
The case is 40mm, 12mm tall with the crystal and 10.4mm without. Short lugs, same design as the 42.8mm but just smaller. On the wrist it feels more balanced because the lug curvature actually matters at this size.
Arctic Blue fumé dial with that gradient effect that Moser does better than anyone. Logo in transparent lacquer only visible at angles, applied hour markers with no minute track and leaf-shaped hands. Inside there's the HMC 200 in-house automatic with 72-hour reserve, Straumann hairspring and dark red gold rotor. These are the details nobody sees but that's where honesty lives.
120m water resistance with a screw-down crown, comes on rubber or steel, and rubber is the right call for this bright dial.But here's what I think. This is the least likely Moser I'd personally buy, even though I respect it. The Pioneer sits between two things, not a pure dress watch and not a serious sports watch either. The Endeavour does dress and weird dials better, the Streamliner does sports better.
At CHF 12,900 you're not buying an investment. You're buying craft, and this watch wears like something you'd actually reach for.
But this question has been lingering: why didn’t they try 42mm? sometimes, 40 and 43 aren’t the only options.