Limited Edition

Endeavour Minute Repeater
Cylindrical Tourbillon Skeleton

Complexity on Full Display

REF. 1909-0500

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With the Endeavour Minute Repeater Cylindrical Tourbillon Skeleton, H. Moser & Cie. unites three of watchmaking’s most demanding expressions: a fully skeletonised architecture, a minute repeater brought dial-side, and a flying tourbillon equipped with a cylindrical hairspring. Each element is complex on its own. Together, they create a unique watch where the interaction of sound, motion, and structure is on full display.

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Minute Repeater

The minute repeater is brought to the forefront, with hammers and gongs displayed dial-side. This radical configuration required a complete rethinking of the movement architecture: curved gongs aligned on a single plane, volumes meticulously recalibrated, and every component refined for both performance and visibility. The hollowed titanium case works as a resonance chamber to amplify the sound. The result is a chime that is both precise and expressive.

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Tourbillon &
Skeletonisation

The flying tourbillon adds a second layer of complexity. Conceived to counteract the effects of gravity on the watch’s timekeeping precision, it demands exceptional craftsmanship to produce. Placing it within a fully skeletonised movement intensifies the challenge. Suspended within a play of light and tension, the tourbillon appears in constant dialogue with the repeater mechanism. Two mechanical languages, oscillation and vibration, united within the same open space.

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Movement

Powering this composition is the hand-wound manufacture calibre HMC 909, entirely skeletonised and built as a three-dimensional structure. Integrating over 400 components, it brings together the minute repeater and flying tourbillon within a single architecture, offering full visibility into its mechanical complexity. With its 90-hour power reserve and components finished and decorated by hand, this is traditional watchmaking pushed to its limits.

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