For the Endeavour Concept Minute Repeater Tourbillon, H. Moser & Cie. presents one of the most traditional watch complications and combines it with a magnificent flying tourbillon performing a spinning waltz. Two shaped chimes and the minute repeater hammers are resplendent against a dial featuring the newest colour in the H. Moser & Cie. catalogue, Electric Blue, intertwining with the tourbillon at 6 o’clock.
To develop the Endeavour Concept Minute Repeater Tourbillon, H. Moser & Cie. drew on the expertise of Timeless SA, a specialist in minute repeaters. Together, the two manufactures created a brand-new design, showcasing the beauty of the complication by positioning the chimes and the hammers on the dial side. This involved overcoming many technical challenges. In particular, the chimes (which are placed on one level to preserve the finesse of the piece) had to be curved so as not to interfere with the flying tourbillon and to respect H. Moser & Cie.’s main focus to keep the design understated.
In creating the movement and the case, significant effort has gone into ensuring elegant proportions. The sliding bolt, fitted on a Teflon runner to ensure it slides perfectly smoothly, is built into the main plate to save space. The case middle has been widened to the maximum in order to accommodate the movement while allowing enough space to create a soundbox. This amplifies the chiming of hours, quarter-hours and minutes by two gongs, onto which fall two hammers that are raised based on information provided by different feeler-spindles.
The geometry of the case has been meticulously designed, developed and adapted to maximise the properties of titanium and enhance its impact, amplifying the resonance chamber whilst allowing the essential walls to form part of the resonance. Titanium has a high elastic modulus, which means that this material deforms very little under stress and is consequently more rigid; its low density ensures that it is also lightweight, and it retains the vibratory energy from sound well, rather than allowing it to dissipate thanks to its low damping effect.
While ensuring the functioning of the minute repeater mechanism was already a complex technical feat, it also required perfect understanding of the subject to achieve a beautiful sound that combines amplitude, a certain length and a pure note.
Visible behind a skeletonised bridge, the dazzling one-minute flying tourbillon at 6 o’clock is fitted to a ball bearing that improves the accuracy and chronometry. The tourbillon appears to float weightlessly on the Electric Blue dial stripped of both logo and indices.
The strap, made from black alligator leather, adds the final touch of elegance to this high-complication timepiece.
Model: Endeavour Concept Minute Repeater Tourbillon
Reference: 1903-0500, titanium model, Electric Blue dial, black alligator leather strap, limited edition of 20 pieces
Diameter: 43.0 mm/height: 14.0 mm
Sliding bolt with runner made from Teflon
See-through sapphire crystal case back
Crown adorned with an “M”
Electric Blue with sunburst pattern
Hammers and chimes on dial side
Leaf-shaped hour and minute hands
Hand-wound HMC 903 calibre
Diameter: 33.0 mm/height: 9.62 mm
Frequency: 21,600 Vib/h
Power reserve: 90 hours
Double Moser stripes on the plate and bridges
Movement and components hand-finished and decorated
One-minute flying tourbillon at 6 o’clock with skeletonised bridge
Hours and minutes
Minute repeater with hour, quarter-hour and minute chimes
Hand-stitched black alligator leather with red lining
Titanium pin buckle, engraved with the Moser logo