Description
H. Moser & Cie. has taken the complication that best expresses its sporting side — the 30-second retrograde seconds — and rolled it across three of its core families in one announcement. The Pioneer Skeleton Retrograde Seconds (ref. 3251-1200), the Streamliner Retrograde Seconds (ref. 6252-1200) and the Endeavour Retrograde Seconds (ref. 1252-1200) all arrive in 40 mm stainless steel, all driven by an in-house HMC automatic topped with a retrograde module built by Agenhor.
What makes this a line-wide statement rather than a single novelty is the spread: a skeleton, an integrated-bracelet sports watch and a dress watch, each given the same restless half-minute hand. Prices run from CHF 30,160 (EUR 35,300 / USD 35,200) for the Endeavour to CHF 37,726 (EUR 44,200 / USD 44,100) for the Pioneer Skeleton. None is a limited edition.
Design
The three cases share a 40 mm diameter but little else. The Pioneer Skeleton is brushed and polished with a 12 mm profile (10.4 mm without the crystal), its dial opened up to anthracite bridges, a golden 30-second arc, an exposed snail cam and gold hands and indices. The Streamliner keeps its brushed case with polished bevels and integrated steel bracelet with a triple-blade folding clasp, and wears a midnight blue fumé sunburst dial with the Moser logo rendered in transparent lacquer. The Endeavour is the thinnest at 11.2 mm (9.9 mm without the crystal), polished with brushed grooves, carrying a black fumé sunburst dial, a black 30-second arc with golden markings, and a night blue nubuck strap.
The Pioneer Skeleton ships with an interchangeable steel bracelet and a khaki rubber strap. Water resistance follows the character of each case: 120 m for the Pioneer Skeleton and Streamliner, 30 m for the dressier Endeavour.
Specifications
- References: 3251-1200 (Pioneer Skeleton), 6252-1200 (Streamliner), 1252-1200 (Endeavour)
- Case material: stainless steel on all three
- Case diameter: 40 mm
- Case thickness: 12 mm / 12.1 mm / 11.2 mm (10.4 / 10.2 / 9.9 mm without crystal)
- Water resistance: 120 m (Pioneer Skeleton), 120 m (Streamliner), 30 m (Endeavour)
- Dial: skeletonised with anthracite bridges; midnight blue fumé sunburst; black fumé sunburst
- Movement: in-house HMC 251 (Pioneer Skeleton) or HMC 252 (Streamliner, Endeavour), automatic
- Complication: 30-second retrograde seconds module by Agenhor
- Frequency: 21,600 vph (3 Hz)
- Power reserve: 3 days
- Strap/bracelet: steel bracelet plus khaki rubber (Pioneer Skeleton); integrated steel bracelet with triple-blade folding clasp (Streamliner); night blue nubuck (Endeavour)
- Limited edition: no, all three are permanent-collection pieces
- Price: CHF 37,726 / EUR 44,200 / USD 44,100 (Pioneer Skeleton); CHF 32,300 / EUR 37,800 / USD 37,700 (Streamliner); CHF 30,160 / EUR 35,300 / USD 35,200 (Endeavour)
- Announced: 7 October 2026
What's Exciting
The engineering story sits in the relationship between the two calibres: the HMC 251 is the skeletonised execution of the HMC 252, not a separate architecture, which is why Moser can offer an open-worked retrograde and a closed-dial retrograde at the same 3 Hz and the same three-day reserve. The Agenhor module is the other half of the story. A 30-second retrograde is a harder thing to live with than a 60-second one — it snaps back twice as often, so the return spring and the snail cam take twice the duty cycle — and Agenhor's module is engineered around exactly that.
What is genuinely new here is scope. Until now the retrograde seconds was a Streamliner signature, something you bought the sports watch to get. Putting it into the Endeavour at CHF 30,160 makes it the entry point to the complication, and in the Pioneer Skeleton it becomes a display piece. Moser has turned a model feature into a house feature, and the Endeavour is the one to watch: it is the thinnest, the cheapest and the one where the half-minute sweep has the least competition for your attention.
History
H. Moser & Cie. traces to Heinrich Moser, who founded the firm in St. Petersburg in 1828 before establishing watchmaking in Schaffhausen; the modern company was revived in 2005 and has been under Melb Holding and the Meylan family since 2012. Its house style — fumé dials, minimal or absent branding, in-house HMC calibres and Straumann hairsprings made by sister company Precision Engineering — was built in that second life.
The retrograde seconds entered the catalogue through the Streamliner, the integrated-bracelet collection launched in 2020 that gave Moser its first genuine sports watch and its longest-running collaboration with Agenhor, the Geneva complication specialist run by the Wiederrecht family. The Endeavour, by contrast, is the oldest of the three families and the purest expression of the Moser dress watch. Bringing the three together under one complication in October 2026 is the clearest statement yet of what the brand wants its signature to be.
