The Roger Dubuis Excalibur Biretrograde Calendar is officially reference RDDBEX1179; retailer naming also uses DBEX1179. Its defining feature is a day-and-date calendar displayed on two retrograde scales, powered by the in-house automatic RD840 movement. Roger Dubuis lists a 40 mm pink-gold case, 60-hour power reserve and Poinçon de Genève certification. The available information describes the watch’s specifications and design, rather than establishing a personal hands-on assessment.
Reference number: RDDBEX1179 or DBEX1179?
Roger Dubuis identifies the watch as RDDBEX1179 on its official product page. Wempe uses DBEX1179 in its retailer naming for the same Excalibur Biretrograde Calendar. Including both forms can help when looking up the model, but the manufacturer’s full reference is RDDBEX1179.
| # | Preview | Product | Price | |
|---|---|---|---|---|
| 1 |
|
Poljot Aviator Mens Wrist Watch Waterproof Calendar USSR Rare Serviced & Oiled | Buy on Amazon |
How does the biretrograde calendar work?
A retrograde hand travels along a semicircular scale, then returns to its starting point when its cycle ends. On this watch, two ecliptic counters show the day and date: each indication advances along its scale and resets at the end of its respective cycle. This differs visually from calendar displays that use continuously rotating discs. Roger Dubuis describes the dial as having seven layers, with the counters forming part of its distinctive layout.
Case, dial and strap
| Feature | Specification |
|---|---|
| Case | 40 mm; pink gold case, bezel, crown and open case back |
| Crystal | Anti-reflective sapphire |
| Water resistance | 10 bar (100 m), according to Roger Dubuis |
| Dial | Silver-plated, satin-brushed surface with pink-gold outlines and text; mother-of-pearl inserts at 12 and 6 o’clock |
| Strap and buckle | Brown calf-leather strap and 18K pink-gold triple-folding buckle |
| Interchangeability | Roger Dubuis describes both strap and buckle as interchangeable through its Quick Release System |
The Quick Release System is the manufacturer’s stated strap-and-buckle feature; the available specifications do not establish compatibility with third-party straps.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
#1 Best Overall
- Custom model. Original vintage movement + Brand new case and dial.
- New leather band
- 17 Ruby Jewels
- Stainless steel back
- Calendar
RD840 movement and certification
The watch uses Roger Dubuis’s in-house automatic RD840, described by the brand as a “Date Monobalancier” movement. It drives the biretrograde day-and-date indications. The manufacturer lists these movement specifications:
- Power reserve: 60 hours
- Components: 244
- Jewels: 40
- Frequency: 28,800 vibrations per hour
- Diameter: 11½ lignes
Roger Dubuis says the movement is decorated and hand-polished to achieve Poinçon de Genève certification. That certification claim and the technical figures above are the manufacturer’s specifications, not independent performance test results.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price and availability
Watch I Love reported a price of €67,500 in 2026, saying Roger Dubuis confirmed the amount. Treat it as a dated report, not a confirmed current price for every market: the brand’s product page does not display a price, and regional pricing and availability are not established here. For a current quote, contact Roger Dubuis or an authorized retailer in your region. Wempe’s listing corroborates the model naming and core specifications, but does not establish worldwide stock or a current price.
What the specifications tell you
The watch’s identity is unusually legible in its design: the paired retrograde indications make the day and date the visual focus, while the seven-layer dial, mother-of-pearl details and pink-gold elements add depth and contrast. Its core facts are straightforward to verify against the brand’s specification: a 40 mm pink-gold case, automatic RD840 movement, 60-hour reserve and 10 bar water resistance. Those details describe the watch; they do not establish how it wears, how accurately a particular example runs, or whether it is currently available at a particular retailer.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
