Grande Complication · Perpetual Calendar
The Perpetuum No. 1 represents the culmination of 139 years of horological mastery. A single piece conceived and executed entirely by hand — from the first sketch to the final engraving of the movement — each of the twelve examples required 2,400 individual hours of work.
Request AvailabilityEach component is individually crafted, decorated, and adjusted by a single master watchmaker. No automation. No compromise. Every surface — visible or hidden — is finished to museum standard.
Hover to explore · Calibre AUR-GC-001
The in-house perpetual calendar movement beats at 28,800 vibrations per hour — a rhythm set by a hand-adjusted silicon hairspring. The 72-hour power reserve comes from a twin-barrel system wound by one of the world's finest bidirectional rotors, crafted from 18k rose gold and engraved with Geneva stripes by hand.
Every material in the Perpetuum No. 1 is chosen for a single reason: it is the finest of its kind on earth. We know where each gram originates.
Extracted and refined in Switzerland. Each case requires 87 grams of platinum, hand-polished over 40 hours to achieve its characteristic cool luminosity.
Single-mine provenance from the Muzo valley — the world's finest source. Set into the dial as a constellation of 12 hour markers, each hand-calibrated by our gem-setter.
18mm domed crystal grown over 30 days in a Kyocera furnace, achieving a hardness of 9 on the Mohs scale. Anti-reflective coating applied in a vacuum chamber in Le Locle.
CITES-certified crocodylus niloticus leather, hand-stitched to a platinum deployant buckle by our master leather artisan in Geneva. Each strap takes 14 hours to complete.
The Perpetuum No. 1 passed through the hands of three master watchmakers — each the finest practitioner of their discipline alive today.
"Each bridge receives seventeen distinct finishing operations before it is considered ready. I have decorated perhaps ten thousand pieces in my career. This movement is different. Every surface is a conversation with time itself."
"The dial requires eleven firings in the kiln at 800 degrees. Between each firing I wait, and I watch. If a single air bubble surfaces in the enamel on the final firing, we begin again. We have begun again six times for this watch."
"I have engraved the caseback with the buyer's coat of arms in the tradition of the great ébauches of the eighteenth century. The composition took three months to design. The engraving itself took eleven days."
Auguste Renard establishes Aurum Manufactures in a wooden workshop above Geneva, producing pocket watches for the European aristocracy.
The Renard Tourbillon Universelle — a pocket watch with minute-repeater, perpetual calendar, and tourbillon — wins the Grand Prix at the Brussels World Exposition.
The atelier relocates to the Vallée de Joux, the spiritual heartland of Swiss haute horlogerie. The manufacture employs 34 master watchmakers.
A commission from three European royal houses establishes Aurum's reputation for discrete, bespoke horological sculpture. All pieces remain in private collections.
Aurum becomes one of fewer than twelve manufacturers worldwide to produce every component — from mainspring to crystal — entirely in-house. The tradition continues unbroken.
Under the fifth generation of Renard family ownership, production is voluntarily limited to 40 watches per year. The waitlist for a bespoke Aurum currently exceeds nine years.
Twelve examples of the most complex wristwatch ever created at the manufacture. The final expression of everything learned in 139 years of making time beautiful.
"There are perhaps five watchmakers alive who could have made the Aurum Perpetuum. The fact that Renard chose to make twelve is either an act of extraordinary generosity or the most refined provocation in horological history."
— Revolution Magazine, February 2026