Rolex Prince

A checked version of this page, approved on 9 October 2026, was based on this revision.

The Rolex Prince is a rectangular Art-Deco family introduced in 1928 and produced into the mid-1940s. Its Aegler shaped movement places the winding barrel at one end of the plate and the balance at the other. The defining dial layout has hours and minutes in the upper register and sub-seconds at six, the format behind the later “doctor's watch” nickname. Period advertising presented the Prince as a chronometer model, but the grade and dial designation still need to be checked on each watch.

The vintage catalog includes 971, 1490, 1491, 1527, 1862, 3361, and 3937, with the unflared 1343 Classic and pocket-watch reference 1645 alongside them. Production tapered during the Second World War as Rolex concentrated on the Oyster Perpetual platform. A documented Prince case carries a 1947 dedication, but that is an example date rather than a firm end date for the family. Watch LIFE NEWS dates the modern Cellini Prince revival to 2005. The Cellini Prince is separate from the vintage rectangular Princes; refs. 5440/8 (yellow gold) and 5441/9 (white gold) each have a page.

Common entry points

Identifying a Brancard?

1490

The larger flared stretcher case. Documented examples use Cal. 300, 350, or 7½′′′ T.S. 300 and appear in steel, yellow or pink gold, two-tone, Tiger Stripe, and platinum.

Researching the earliest Prince?

971

The early flared stretcher case, dated to about 1928 in Friedberg's 2001 TimeZone article. Later auction catalogues often use Brancard for the 1490 instead.

Cross-checking a non-Brancard Prince?

1343

The Prince Classic, with an unflared rectangular case. Its A and B suffixes identify documented metal and dial branches; the launch pairing remains disputed between published sources.

References

The active-scope Prince references covered on this wiki include ref. 1768, documented in auction catalogues as “Railway.”

Reference	Production	Case shape	Movement family	Key distinction
1343	c.1928/1929–c.1935	Unflared rectangular Classic	Aegler 7½ ligne shaped, 15j Observatory Quality	The Prince Classic; the unflared sister to the 971/1490 Brancards. Suffix system: 1343 (silver), 1343A (standard, multiple metals), 1343B (Tiger Stripe two-colour gold). Friedberg reads 1343 + 971 as the 1928 launch pair; Rolex Magazine 2017 reads 1343 + 1490
971	1928 hallmark; Sotheby's dates a 971U example c.1939	Early Brancard "stretcher"	Aegler shaped (early variants)	Friedberg's 2001 TimeZone article applies Brancard to the 971; later auction catalogues often use it for the 1490
1490	c.1928–c.1945	Larger flared Brancard, ~36–37×22–23mm body	Cal. 300 / Cal. 350 / Cal. 7½′′′ T.S. 300	The most frequently catalogued Prince reference, with documented examples in steel, 9K/10K/14K/18K gold, pink gold, two-tone, Tiger Stripe bi-color, and platinum
1491	c.1930s	Brancard sibling	Aegler shaped	Brancard variant, smaller production
1527	c.1930s	Rectangular	Aegler shaped	Prince variant
1768	Auction dates c.1927–c.1940; production endpoints unknown	Stepped rectangular	Manual wind; catalogues use differing movement labels	“Railway” auction name; two-register dial, with steel, gold, and mixed-metal examples Christie’s, case 011069
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)
1880	1930s examples; endpoints unknown	Rectangular	Manual wind; catalogues variously record HW, C.360, Ultra Prima and a curved-sided 17-jewel movement	Steel, partly gilt steel and a directly identified 9ct-gold Prince Elegant retailed by C. Bucherer; Christie’s lot 410, Sotheby’s lot 166 and Ineichen lot 133 identify the reference
3361	c.1930s–1940s	Rectangular	Aegler shaped	Late Prince variant
3937	c.1938–c.1950 catalogue examples; production span unknown	Rectangular	Prince movement descriptions vary by lot	Late Prince variant
1645	Auction examples dated c.1930–c.1945; one Antiquorum catalogue gives a broader early-1940s–1950s span	Irregular hexagonal open-face pocket watch with snap-on back and hinged bow	Shaped manual movements catalogued as 17-jewel Ultra Prima or Class A Observatory; the Field Manual lists 5096, unconfirmed on a movement	Prince Imperial name; steel, two-tone and gold cases with separate time and seconds dials

The Brancard nickname

A naming dispute runs through the literature. Modern auction catalogues routinely call the 1490 a Brancard, while editorial sources are split. Michael Friedberg's 2001 TimeZone article assigns the name specifically to the earlier reference 971 and treats the 1490 as a separate, larger Prince. Andres Ibarguen's 2021 doctor's-watch piece for Coronet Magazine follows Friedberg.

The two readings describe the same case family. 971 was the earlier flared stretcher case, and the 1490 is its larger evolution. Both qualify by their profile. The reference number is unambiguous; the nickname depends on the source's period and convention.

Movement family

The Prince runs on Aegler shaped movements built in Bienne under Hans Wilsdorf's supply arrangement with Aegler. Rolex did not buy Aegler outright from the Borer family until April 2004, as Tim Mosso reports for Quill & Pad.

Three calibers carry the family. Cal. 300 is the base Prince movement, 15 jewels at 18,000 vph with about 50 hours of power reserve, produced about 1928–1937. It shares the Aegler shaped-movement architecture with Gruen's Cal. 877, sold under another brand. Some early Prince literature lists “Cal. 877” for the Rolex; Oren Hartov's Analog/Shift history of the doctor's watch treats that as a sibling-movement attribution rather than the Rolex caliber designation.

Cal. 350 also runs 15 jewels, 18 on some examples, and is documented on multiple 1490 examples catalogued at Phillips and Monaco Legend. The Cal. 7½′′′ T.S. 300 is the Ultra Prima movement: 18 jewels, lateral lever escapement, monometallic balance with micrometer regulator, Breguet overcoil hairspring, rhodium-plated and adjusted in six positions, produced about 1932–1938. Some secondary sources expand “T.S.” as “Très Soigné,” but that wording is not established here as a period designation.

Grading runs separately from the caliber number. Aegler and Rolex used Prima, Extra Prima, and Ultra Prima grades, with additional regulation and finishing at the higher levels. “Chronometer” and “Observatory” dial designations are associated with Extra Prima and Ultra Prima examples; the movement grade must be checked rather than inferred from the case reference alone.

Prince movements appear in the wider Kew-Teddington and Swiss chronometer record, but the surviving sources do not provide a complete submission list for every Prince caliber. The 1914 Class A Kew certificate often cited by Rolex belongs to an earlier ladies' movement and predates the Prince family. A certificate or dial designation should therefore be tied to the individual movement and watch, not generalized across the whole catalog.

Related families

Bubbleback — the parallel Oyster line, covering a similar 1928–1948 period and sharing the Aegler supply relationship. Its case shape and catalogue role are different.
Air-King — the post-war successor. The 1945 4925 / 4365 / 4499 originating Air-Kings open the line that effectively replaces the Prince in the catalogue.

Shared references

Serial numbers by year — Rolex serial conventions across the Prince era, including the Glasgow and London assay date letters that often pin a 9K example to a single year
Movement reference — the Aegler shaped-movement family (Cal. 300, Cal. 350, Cal. 7½′′′ T.S. 300) and the Prima / Extra Prima / Ultra Prima grading tiers
Bracelet & clasp guide — bracelet types, end-links, and clasp date codes

Sources

Sotheby’s, 2023, Prince Imperial 1645, lot 331
Antiquorum, 2013, Prince Imperial 1645, lot 105
Tennants, 2023, Prince Imperial 1645, lot 2170
Colin A. White, The Vintage Rolex Field Manual, “Prince, Princess & Queen References” table: ref. 1645 listed with 5096 in the Cal. column.