January 28 2026

H. Moser & Cie. Brings Openworked Tourbillon Mechanics To The Endeavour

MRSTATELESS H. MOSER, NEW RELEASES 2026, Openworked Dial, Red Gold, Tourbillon 0

H. Moser & Cie. continues to raise the technical scope of its Endeavour collection with the introduction of the Endeavour Tourbillon Skeleton, a model that combines classical case design with a fully openworked automatic tourbillon movement. The watch marks the first time the manufacture’s Calibre HMC 814—previously seen in the Streamliner collection—has been housed within the Endeavour line.

Case and Design

The Endeavour Tourbillon Skeleton is presented in a 40 mm 5N red gold case with a total thickness of 10.70 mm, maintaining the slim proportions characteristic of the collection. The case features a polished concave bezel, a fluted crown, and gently curved flanks with alternating finishes. Vertically brushed surfaces are contrasted by a polished groove running along the caseband, a signature design element of the Endeavour family.

Sapphire crystals are fitted on both the front and back, allowing unobstructed views of the openworked movement from either side.

Skeletonised Architecture

The dial side is defined by its fully skeletonised construction, emphasizing symmetry and transparency. The anthracite-toned bridges and main plate are decorated with straight, drawn strokes, creating a structured visual framework for the movement. Applied hour markers and leaf-shaped hands are gold-plated, providing contrast against the darker movement components and supporting legibility despite the open design.

Positioned at 6 o’clock, the one-minute flying tourbillon dominates the display. It is fitted with a double hairspring, manufactured in-house by Precision Engineering AG, H. Moser & Cie.’s sister company. The use of paired hairsprings improves isochronism by reducing positional errors.

Calibre HMC 814

Powering the watch is the In-house Calibre HMC 814, an automatic movement derived from the HMC 804. Unlike the brand’s HMC 811 tourbillon skeleton movement, the HMC 814 was selected for its slimmer construction, making it better suited to the refined proportions of the Endeavour case.

The movement operates at 21,600 vibrations per hour (3 Hz) and offers a 72-hour power reserve. Winding is handled by a bidirectional pawl winding system, and the calibre consists of 167 components and 28 jewels. The skeletonisation extends to the barrel, allowing the mainspring to be seen in operation.

Finishing includes polished bevels and carefully executed surface treatments throughout the movement, consistent with H. Moser & Cie.’s contemporary approach to haute horlogerie.

Strap and Availability

The Endeavour Tourbillon Skeleton is paired with a dark brown nubuck alligator leather strap, reinforcing the watch’s elegant character. The model is part of H. Moser & Cie.’s permanent collection and is priced at CHF 85,400.