H. Moser & Cie. Endeavour Perpetual Moon Concept

With the Endeavour Perpetual Moon Concept model, H. Moser & Cie. pays remarkable homage to the lunar body. With two resolutely contemporary models, H. Moser & Cie. reinterprets the most poetic complication ever; showcasing the eye-catching moon in a large window at 6 o’clock, in all its splendour. A perpetual moon, the Endeavour Perpetual Moon Concept is one of the most precise moon phases available, with one day’s deviation every 1027 years.

By reinterpreting the moon phase in such an understated way, H. Moser & Cie. highlights the beauty of the lunar body in an ode to its purity. Nestled at the heart of the Concept dial, which features neither logo nor indices, the moon shines through in a large window at 6 o’clock. Surrounding it there is only space, seemingly interplanetary space.

This effect is enhanced by the dial which is made from Vantablack® for the steel model. It is the darkest black dial to be produced yet. The Endeavour Perpetual Moon Concept in steel has an elegant, serene and refined moon phase display. A contemporary and bold design equipped with a black leather strap.

More sensual, the 5N red gold version features an H. Moser & Cie. midnight-blue fumé dial. Its deep lustres, with twilight tones, are perfectly matched with the red gold of the case. A brown alligator leather strap adds the finishing touch.

The Endeavour Perpetual Moon Concept is powered by the HMC 801 hand-wound Manufacture calibre, equipped with an interchangeable Moser escapement. This calibre ensures the watch has a minimum 7-day power reserve, with an indicator on the movement side. The moon phase system is an extremely precise display that can be set, read and predicted to within a minute. The system can be easily adjusted using a push-button on the side of the case.

On average, the moon’s orbital period lasts 29.53059 days. To be more precise: 29 days, 12 hours, 44 minutes and 2.9 seconds. The Endeavour Perpetual Moon Concept’s intricate wheel train portrays this interval so precisely that the gap is a mere 0.23 seconds per day, that is to say one day’s deviation after 1027.30 years, making it the most precise model available.

Available in steel or red gold, the Endeavour Perpetual Moon Concept is available in a limited edition of 50 pieces for each of the two references.

Technical details

Model: Endeavour Perpetual Moon Concept
– Reference 1801-1200, steel model, Vantablack® dial, black leather strap, limited edition of 50 pieces
– Reference 1801-0400, 5N red gold model, midnight-blue fumé dial, brown alligator leather strap, limited edition of 50 pieces

Case
Steel or 18-carat 5N red gold
Diameter: 42.0 mm, height: 12.9 mm
Sapphire crystal
Screw-in crown adorned with an “M”

Dial
Vantablack® or midnight-blue fumé with sunburst pattern
Leaf-shaped hour and minute hands
Centre seconds and AM/PM hands
Moon phase window

Movement
Hand-wound HMC 801 Manufacture calibre
Diameter: 34.0 mm or 15 lignes, height: 6.5 mm
Frequency: 18,000 Vib/h
28 jewels and screwed gold mounts
Power reserve: minimum 7-day with a double barrel
Bevelled ring and Moser teeth for all wheels and pinions
Interchangeable Moser escapement
Original Straumann Hairspring®
Traditional screw balance wheel with gold adjusting screws
Gold escapement wheel and pallet fork

Functions
Hours and minutes
Centre seconds hand and hacking seconds
AM/PM indicator – Hours 12 to 6 o’clock representing AM and 7 to 11 o’clock representing PM
Large moon-phase indicator display
Power reserve indicator on movement side
Moon-phase adjuster push-button on the case flank

Strap
Hand-stitched black leather or brown alligator leather
Steel or 18-carat 5N red gold pin buckle engraved with the Moser logo

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