Reference:prince
Rolex Prince
The Rolex Prince is the rectangular Art-Deco family that ran from the 1928 launch into the mid-1940s. It was Rolex's bid for the men's chronometer market, built around an Aegler-patented (1927) shaped movement that placed the winding barrel at one end of the case and the balance at the other. The dial layout that defined the line is the duo-dial: hours and minutes in the upper register, sub-seconds at six, two visually separated tracks on the same plate. Marketing positioned the Prince as "the watch for men of distinction" — a 1930 advertisement reproduced by Rolex Magazine puts it in those exact words — and the chronometer-grade movement made the claim defensible.
The family runs across seven catalog references in the active scope of this wiki: 971 (the original Brancard), 1490 (the canonical larger Brancard), 1491 (Brancard sibling), 1527, 1862, 3361, and 3937. Production tapered through WWII as Rolex consolidated around the Oyster Perpetual platform; the latest documented Prince case carries a 1947 caseback dedication. The Prince does not return to the Rolex catalog until the 2005 Cellini Prince revival, which sits on a different platform and is not part of the vintage Prince story this page covers.
References
The active-scope Prince references covered on this wiki:
| Reference | Production | Case shape | Movement family | Key distinction |
|---|---|---|---|---|
| 971 | c.1928–early 1930s | Early Brancard "stretcher" | Aegler shaped (early variants) | The original Brancard; Friedberg's 2001 Timezone article assigns the Brancard nickname here, while modern auction-house convention has shifted the nickname to the 1490 |
| 1490 | c.1928–c.1945 | Larger flared Brancard, ~36–37×22–23mm body | Cal. 300 / Cal. 350 / Cal. 7¾′′′ T.S. 300 | The canonical Brancard; the most heavily catalogued Prince reference, with documented examples in steel, 9K/10K/14K/18K gold, pink gold, two-tone, Tiger Stripe bi-color, and a single platinum example (Bonhams 2017, GBP 32,500) |
| 1491 | c.1930s | Brancard sibling | Aegler shaped | Brancard variant, smaller production |
| 1527 | c.1930s | Rectangular | Aegler shaped | Prince variant |
| 1862 | c.1930s–1940s | Rectangular | Aegler shaped | Prince variant; surfaces alongside the 1490 in Christie's group lot 1395-307 (18K, case 16,663, c.1938) |
| 3361 | c.1930s–1940s | Rectangular | Aegler shaped | Late Prince variant |
| 3937 | c.1930s–1940s | Rectangular | Aegler shaped | Late Prince variant |
Articles are added incrementally; references without a linked article are researched but not yet published.
The Brancard nickname
A naming dispute runs through the literature. Auction houses uniformly call the 1490 a Brancard — Phillips, Sotheby's, Bonhams, Antiquorum, and Christie's all use the word in their catalog titles for the reference. Editorial sources are split. Michael Friedberg's 2001 Timezone article assigns the Brancard name specifically to the earlier reference 971, treating the 1490 as a separate larger Prince. Coronet Magazine's 2021 doctor's-watch piece follows Friedberg.
The reconciliation most consistent with published evidence is that 971 was the first Brancard — the earliest version of the flared stretcher case — and the 1490 is the larger evolution of the same case shape. Both qualify as Brancard cases by their flared profile. Modern auction-catalog convention treats the 1490 as the headline Brancard reference, and that convention dominates collector search. The reference number is unambiguous; the nickname is contested.
Movement family
The Prince runs on Aegler shaped movements, manufactured in Bienne under H. Wilsdorf's exclusive supplier arrangement (a relationship that remained a supplier-only contract until Rolex purchased Aegler outright from the Borer family in April 2004, per Tim Mosso's Quill & Pad reporting). The shaped-movement family includes:
- Cal. 300 — 15 jewels, 18,000 vph, approximately 50 hours of power reserve, produced 1928–1937. The base Prince caliber. Architecturally identical to the Gruen Cal. 877 used in the Gruen Techni-Quadron — the two are sibling movements in the same Aegler family, sold under different brands. Some early Prince literature lists "Cal. 877" for the Rolex Prince; this is a misattribution traceable to the Gruen-Rolex sibling relationship and should be excluded from canonical Prince caliber listings, per Oren Hartov's Analog/Shift Doctor's Watch piece.
- Cal. 350 — 15 jewels (some examples 18 jewels). Documented on multiple 1490 examples at Phillips and Monaco Legend.
- Cal. 7¾′′′ T.S. 300 — Très Soigné, 18 jewels, lateral lever escapement, monometallic balance with micrometer regulator, Breguet overcoil hairspring, rhodium-plated, adjusted in 6 positions, produced 1932–1938. The Ultra Prima movement variant.
Movement grading is a separate axis from caliber number. Aegler / Rolex used a tiered finishing hierarchy on the Prince calibers — Prima, Extra Prima, Ultra Prima — corresponding broadly to ascending levels of regulation, hand-finishing, and chronometer testing. The "Chronometer" or "Observatory" dial designation corresponds to Extra Prima or Ultra Prima grading; a Prima-grade movement does not earn the dial mark.
The Kew-Teddington observatory testing tradition runs through the Prince era. Rolex submitted Prince movements to the National Physical Laboratory at Kew for independent rate certificates against the Swiss Bureaux Officiels Suisse de Contrôle. The Kew protocol was a 45-day test against the Swiss bureau's 15 days; James Dowling has cited Rolex pass rates of 136 out of 145 Class A submissions in the 1940s and 1950s. The 1914 Class A Kew certificate that Rolex commonly cites as their first official chronometer rating was issued for an earlier ladies' wristwatch movement; the Prince calibers extend the observatory-testing lineage from 1928 forward, but the 1914 milestone predates the Prince family.
Reference guides
Cross-family material that applies across multiple Prince references:
- Movements — the Aegler shaped-movement family (Cal. 300, Cal. 350, Cal. 7¾′′′ T.S. 300) and the Prima / Extra Prima / Ultra Prima grading tiers.
- Serial numbers — Rolex serial conventions across the Prince era, including Glasgow and London assay date letters that often pin a 9K example to a single year.