The Roger Dubuis Excalibur Biretrograde Calendar RDDBEX1179 pairs a 40 mm pink-gold case with two retrograde calendar hands: one indicates the day and the other the date. Its automatic RD840 monobalancier movement has a 60-hour power reserve and Poinçon de Genève certification, according to the manufacturer. The specifications below come chiefly from Roger Dubuis; price and retailer availability require separate qualification.
What does the bi-retrograde display show?
The two arcing indications show the day of the week and the date. Roger Dubuis explains that a retrograde hand travels along a semicircular scale, then returns to zero at the end of its cycle. The paired layout gives the calendar information a more prominent role than a conventional date window, while making the day and date visible on separate scales.
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The Fondation de la Haute Horlogerie describes the RD840 as an automatic calibre with a day-date complication and small seconds. That is useful context for the movement’s functions; the manufacturer’s product description specifically highlights the bi-retrograde calendar.
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How does the day and date hand reset?
Each hand sweeps across its own scale and returns to the starting point when that indication’s cycle ends. In practical terms, the day indication completes its weekly cycle, while the date indication completes its monthly sequence. The reset is part of the retrograde display’s operation, rather than a hand making a full 360-degree circuit.
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The cited product information explains the return-to-zero action, but does not give adjustment instructions or specify how to set the calendar. Consult the watch’s supplied documentation or an authorized service professional for setting guidance rather than assuming a particular crown or correction procedure.
What movement is in the Roger Dubuis RDDBEX1179?
Roger Dubuis specifies its automatic RD840 monobalancier, with the bi-retrograde day-date calendar and Poinçon de Genève certification. The brand says the calibre is made in-house and decorated and hand-polished to achieve that certification. These are the manufacturer’s descriptions; the figures below are stated specifications, not independent performance measurements.
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| Movement detail | Manufacturer-listed specification |
|---|---|
| Calibre and winding | RD840 monobalancier, automatic |
| Calendar | Bi-retrograde day and date |
| Power reserve | 60 hours |
| Components | 244 |
| Jewels | 40 |
| Frequency | 28,800 vibrations per hour |
| Certification | Poinçon de Genève |
The Fondation de la Haute Horlogerie places the brand’s bi-retrograde history in the context of a 1989 co-patent by Roger Dubuis and Agenhor founder Jean-Marc Wiederrecht. That historical context does not establish that this particular watch uses the same patented mechanism or design unchanged.
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How big is the Excalibur Biretrograde Calendar?
Roger Dubuis lists a 40 mm diameter pink-gold case and water resistance of 10 bar (100 m). The official specification also lists a sapphire crystal with anti-reflective coating. These are published product specifications, not results from an independent test.
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What are the dial, strap and clasp details?
The manufacturer describes a silver-plated dial with a double-surface flange, pink-gold accents, and mother-of-pearl inserts at 12 and 6 o’clock. The watch is supplied with a brown calf-leather strap and an 18K pink-gold triple-folding buckle. Roger Dubuis says the strap can be changed using its Quick Release System (QRS). That feature establishes an interchangeable attachment system, but does not confirm the fit of an unverified third-party strap.
How much does the RDDBEX1179 cost?
Watch I Love reported a price of €67,500 in a July 2026 article, attributing the figure to Roger Dubuis. This is a dated secondary report, not a current price confirmed on the official product page. Check with Roger Dubuis or an authorized retailer for a current quote and the terms applicable in your market.
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Where can you check availability?
Wempe lists the 18k rose-gold, 40 mm watch with the RD840 movement and invites readers to check showroom availability. A product listing and availability prompt do not confirm current stock at a particular location. Contact the retailer directly to verify whether the reference can be viewed or purchased.
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