Introducing the H. Moser & Cie. Endeavour Minute Repeater Cylindrical Tourbillon Skeleton

H. Moser & Cie. definitely have a different vision of watchmaking to everyone in the industry. Whether it’s the minimalist designs, alternatively interpreted complications, or just the crazy watches they keep bringing out, they manage to wow every time. The Endeavour Minute Repeater Cylindrical Tourbillon Skeleton is no different in that regard. Taking the opposite route to most Minute Repeaters, which are compeltely hidden away behind the dial, this watch puts it in full view for everyone to admire. This is a bold design for sure, but one that Moser have been refining for years with the series of skeletonized pieces that have come before. Let’s get into the details and see why this is the ultimate watch in Moser’s skeletonized lineup.

The Basics

Case: 40mm, Titanium.
Crystal: Sapphire.
Movement: Manual Winding, HMC 909, fully skeletonized, minute repeater, tourbillon.
Water Resistance: Not specified.
Strap Options: Grey nubuck alligator leather strap.
Price: $415,800 USD.
Availability: Not specified.

The Juice

The first thing you notice about this watch is the layout. There is a ton of negative space, which really helps draw your attention to the array of complications on display. The minute repeater isn’t buried inside the movement: it’s placed directly on the dial side. The hammers and gongs sit in full view, occupying the same visual space as the rest of the watch. On most minute repeaters, you are lucky if you can catch a glimpse of this mechanism from the caseback, let alone the dial side.

Then there’s the case, which plays a more active role than usual. On a normal Moser Endeavour, the case is a combination between dressy and sporty, but not too much more. Here, the case is central to the proper functioning of the minute repeater. The middle section is hollowed out to act as a resonance chamber, effectively turning the watch into a sound box. The use of titanium here is a tactical move, as it has low damping and preserves vibration. The result is that you get a chime that’s clearer and longer than you might expect. It’s easy to overlook how much of the sound quality comes from the case, but here it is definitely not a problem.

The tourbillon adds another layer. In most watches, the tourbillon is the main feature, but here it is just another detail- a fabulous one though. Positioned at 6 o’clock, it’s a flying construction with no upper bridge, which keeps the view unobstructed. As I said, this watch has a lot of negative space, which really helps with visibility. More importantly, the tourbillon uses a cylindrical hairspring, a detail that’s both technically significant and increasingly rare. Unlike a flat hairspring, the cylindrical version rises vertically around the balance staff. This reduces positional errors, but it’s also much harder to produce. Each one is shaped by hand, a process that takes significantly longer than a traditional spring. Yes, you read that right: it is made by hand.

Thus far we have mostly focused on the complications not really covered the main function of the watch: telling the time. At 2 o’clock, there’s a small interruption: a domed blue fumé subdial. It’s the only solid surface on the dial and acts like a tiny reminder of Moser’s other watches with their beautiful dials. You’re getting the best of Moser in this watch, with both the complications and the dial artistry.

Final Thoughts

The Endeavour Minute Repeater Cylindrical Tourbillon Skeleton is high-horology at its finest. Combining artistry and craftsmanship with some of the finest horological engineering, this watch manages to embody everything we look for in a high-end watch. You might think that this will be a loud watch, but I can assure that could not be further from the truth. A piece like this will sit quietly on the wrist and then stun people when they find out what it actually is and the extent of what it is capable of. Thus far, I sincerely believe that this is going to be one of the best combinations of complications we will see at Watches & Wonders in 2026.

Find out more about this watch here.