Rolexopedia

Rolex 971

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Prince › 971

Pink Zebra: 18K pink + white gold bicolor, Antiquorum 2023 lot 138
Pink Zebra: 18K pink + white gold bicolor, Antiquorum 2023 lot 138

The 971 is an early rectangular Prince reference associated with the Brancard case. The Prince family appeared around 1928 with an Aegler shaped movement, a duo-dial, and a large seconds register at six. “Doctor’s watch” is later collector and trade language for this layout. A 1928 English hallmark and a Sotheby’s 971U catalogued circa 1939 are dated examples, but they do not establish the reference’s production limits. The larger 1490 became the more frequently catalogued Brancard reference.

Core facts

detail value
reference 971
family Prince (rectangular Art-Deco doctor's watch)
production 1928 hallmark on one case; Sotheby’s dates a 971U example to circa 1939; production endpoint unknown
case shape rectangular flared "Brancard" stretcher; Friedberg's "outer frame" Rolex-period term
case dimensions approximately 23–24 mm × 36–38 mm body; 33.5 × 42.5 mm with horns (Phillips platinum Geneva V)
case construction two-piece, snap or screw caseback by variant
crystal acrylic; period mineral glass on earliest examples
crown onion / pull-out, non-screw (the Prince was not a water-resistant case)
lug style integrated flared, continuous with the case flanks
bezel smooth; stepped on some variants
movement family Aegler shaped: Cal. 300 / Cal. 350 (rectangular plates, 1928–1935); Cal. 360 HW (tonneau plates, 1936 onward)
movement grades Prima (15 jewels) / Extra Prima (18 jewels, 6-position) / Ultra Prima (top tier, 6-position chronometer)
beat rate 18,000 vph
power reserve approximately 50 hours (Watch-Wiki, Watch I Love); Friedberg's 58-hour figure is an outlier
balance bimetallic (early), with Breguet overcoil hairspring
escapement lever
chronometer dial designation “Chronometer” or “Observatory” appears on higher-grade documented examples; the suffix-to-grade mapping is not universal
dial layout duo-dial with oversized sub-seconds register at six (the "doctor's watch" feature)
sub-references documented 971 (base), 971A (18K bicolor), 971U (catalogue suffix; meaning unresolved); 971S remains unconfirmed

Where it sits in the line

Rolex launched the Prince family in 1928 as a shaped dress-watch line alongside the Oyster. The 971 is the opening reference. The earliest documented 971 carries an English hallmark dated 1928 (the Arman Collection sterling example, Antiquorum NY March 2010 lot 401, case 70,064). Glasgow-imported silver 971s cluster at case numbers 70,668 and 71,883 with 1929 hallmarks; the matching movement-number range of 70k–75k pins this group to 1929–1930.

By the early 1930s the 1490 appears as a larger flared relative, and it is more frequently represented in later catalogues. The 971 remains documented in parallel, including a 1930s Tiger Stripe example. These auction records show survival and case dating; they do not establish a complete production endpoint.

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. The Princess and Queen smaller spin-offs are separate ladies-line references (3361, 3362), not 971 variants.

The Brancard nickname — 971 versus 1490

Auction houses today apply "Brancard" to both the 971 and the 1490. Friedberg's 2001 TimeZone article assigns the nickname specifically to the 971: "the especially famous Prince Brancard (ref. 971)." Coronet Magazine's 2021 doctor's-watch piece follows Friedberg. Rolex Magazine treats the 971 as the Brancard; some dealer guides instead assign the term to the 1490. A 2023 dealer guide reverses the assignment, applying "Brancard" to the 1490 and omitting the 971 entirely.

The two references share a flared case family. Early collector writing assigns “Brancard” specifically to the 971, while modern auction catalogues often use it for the 1490. The naming is a source convention rather than a separate factory designation.

Sub-references — 971, 971A, 971U, 971S, Zebra, Tiger Stripe, Pink Zebra

  •  
    9K Zebra — Antiquorum 2020 lot 235, yellow + white gold (Antiquorum convention: 9K = Zebra, 18K = Tiger Stripe)
  •  
    971A 18K Tiger Stripe — Antiquorum NY 2008 lot 266

Auction catalogues use several suffix and colour conventions for the 971. The usage is not uniform, so each label below is tied to the source that uses it.

971. Catalogue records use the unsuffixed reference across different case materials and movement descriptions. The available examples do not establish a complete suffix or material system.

971A. Auction catalogues use this suffix for some 18K yellow-and-white-gold bicolor cases, often called “Tiger Stripe.” The 2008 Antiquorum lot is a documented example. The case construction should be checked directly; the available fake-case discussions are leads for inspection, not a complete authentication rule.

971U. Catalogues use the suffix across several case materials and movement descriptions. Christie’s dates a platinum example with a numbered Observatory movement to the 1920s; its indistinct case number and unreported hallmark leave that estimate separate from the 1928 hallmark documented on another 971. Christie’s also catalogues silver examples with Extra Prima movements and Glasgow import marks dated 1930. Sotheby’s describes a circa-1939 971U in stainless steel and 9K yellow gold with a 15-jewel manual movement. These records do not establish what the suffix meant to Rolex or whether every catalogue attribution is factory-correct.

971S. Silver. Community-asserted, with the suffix appearing in a RolexForums thread title (978611). Silver examples in the auction record are typically catalogued as plain "971" without the S suffix; whether 971S is a Rolex-canon designation or a forum convention is not yet primary-confirmed.

Zebra. 9K bicolor yellow + white gold. Antiquorum convention separates this from Tiger Stripe by purity: 9K = Zebra, 18K = Tiger Stripe. Antiquorum March 2020 lot 235 records a 9K Zebra with caseback monogram "B D J". Bonhams December 2017 lot 133 records another 9K white-and-yellow bicolor example.

Pink Zebra. Antiquorum’s 2023 lot 138 records an 18K pink-and-white-gold bicolor case, number 45,950, with German collector provenance. The source set does not establish a production count relative to yellow-gold bicolor cases.

The case — Brancard stretcher

The 971 case is a two-piece rectangular structure in the flared "Brancard" form. The body measures approximately 23–24 mm wide by 36–38 mm long; with the horns the measurement runs to roughly 33.5 × 42.5 mm (Phillips Geneva V platinum, case 6,013) or 41 mm long on the larger 971A bicolor variants. The discrepancy across catalog sources is consistent with the convention each house uses — some measure the bezel only, others the case-to-horn-tip span, and the flared profile makes any single dimension misleading. Forum collector reports cluster at 41 mm long for 971A on the wrist.

The flared profile is an Art-Deco case form. The case curves outward at the lug ends and back toward the centre — a stretcher-on-its-end silhouette, hence the French brancard. The lugs are integrated into the case rather than soldered or spring-bar drilled, a one-piece flared structure that takes a strap on through-pins. The crystal is acrylic by the standard production period; the earliest examples sometimes carry period mineral glass.

The crown is onion-form push-pull, non-screw. The Prince was a dress watch, not a water-resistant case, and the crown configuration reflects the priority — easier winding access, no Oyster waterproof seal. Gold cases carry gold crowns; steel cases carry steel Rolex crowns. The crown signature is a useful authentication check.

The caseback is two-piece — snap on most variants, screw on some. Bonhams HK April 2023 lot 644 explicitly notes a snap caseback on the 1938 Tiger Stripe.

Case materials

 
Eaton 1/4 Century Club presentation: T.D. Switzer 1907–1932 service dedication

The 971 has documented examples in several case materials, including:

  • Sterling silver, hallmarked: the most frequently represented configuration in the cited auction record, particularly with Glasgow and Edinburgh import marks dating 1928–1930. Sotheby's Important Watches Hong Kong 2019 lot 1075 (case 02,508, c.1935, Extra Prima 15j) and Bonhams London September 2018 lot 37 (Glasgow 1929) are documented examples.
  • 9K yellow gold, Glasgow-assayed.
  • 9K bicolor yellow + white gold ("Zebra"): documented by Antiquorum March 2020 lot 235 and Bonhams NY December 2017 lot 133. The 9K bicolor is physically distinct from the 18K Tiger Stripe.
  • 9K + steel two-tone: documented on the Eaton 1/4 Century Club presentation (Monaco Legend July 2019 lot 156).
  • 14K + steel two-tone: same Eaton presentation, case 1,472, dial signed "Eaton / 1/4 Century Club," caseback engraved "Presented to T.D. Switzer to mark a quarter-century of continuous service with T. Eaton C., Ltd., 1907–1932." The Eaton Toronto retailer program issued Princes as 25-year service awards, and the 1907–1932 service window on this watch establishes that the 971 was the earliest Prince used in the Eaton program — predating the 1490s that took over the program later.
  • 18K yellow gold: Antiquorum 2008 Geneva lot 690 (Observatory 15j).
  • 18K yellow + white gold ("Tiger Stripe" / 971A): a documented bicolor variant, with auction examples spanning Glasgow 1929 through case 68,591 in 1938.
  • 18K pink + white gold ("Pink Zebra"): Antiquorum May 2023 lot 138.
  • Stainless steel: less common in the cited auction record. Antiquorum November 2024 lot 462 (case 74,768 with original box and rate certificate) is a documented example; RolexMagazine references a 1934 all-steel Brancard without specifically tagging it 971S.
  • Platinum: documented examples include Phillips cases 6,047 and 6,013 and Antiquorum case 6,077. These are individual lots, not a complete platinum population.

The movement

 
Platinum 971, case 6,013, Cal. 300 7½′′′ 18-jewel, black dial, c.1935, Phillips Geneva V

The 971 uses an Aegler shaped movement based on the 1927 Wilsdorf–Aegler patent for a movement with a separate seconds dial. The barrel and balance occupy opposite ends of the plate. Aegler was the movement maker in Bienne; the historical ownership relationship changed later, but that modern corporate history does not date an individual 971.

Two distinct caliber generations appear in 971 cases, and they are visually identifiable from the movement plate shape:

  • Cal. 300 / Cal. 350 — rectangular plates, 1928–1935. 7½ by 14½ lignes. 18,000 vph. Approximately 50-hour power reserve. 15 jewels at the Prima base; 18 jewels at Extra Prima and Ultra Prima with 6-position adjustment. Phillips Geneva V lot 212 documents a platinum 971 with Cal. 300 7½′′′ 18-jewel movement in case 6,013 dated 1935.
  • Cal. 360 HW — tonneau plates, 1936–late 1930s. The successor caliber for the late-period 971s and the 1936-onward Prince family broadly. Auction houses routinely lump both calibers as "Prince movement" without distinguishing the plate shape; the NAWCC discussion (Doug Sinclair, gmorse, Cary Hurt, March 2013) is the load-bearing source for the cal. 300 versus cal. 360 split. A 971 with rectangular movement plates is a 1928–1935 example; a 971 with tonneau plates is 1936-onward.

Auction and movement references describe Prima, Extra Prima, and Ultra Prima grades with different jewel and adjustment specifications. “Chronometer” and “Observatory” markings occur on higher-grade examples, but the dial wording should be checked against the movement certificate and movement itself. The auction record does not prove that every platinum case was reserved for a particular grade.

The cal. 300 winding-stem bridge is a known failure point. A 971 that sets time but disengages immediately is symptomatic of a broken stem bridge. Aftermarket CNC-machined brass replacement bridges circulate among watchmakers, and aftermarket "cal. Prince TS" winding stems are commercially available. Owners of cal. 300 971s should treat the stem bridge as a known maintenance item rather than a hidden fault.

Dial — the duo-dial and the doctor's watch

The 971 dial is a duo-dial: hours and minutes in the upper register, an oversized sub-seconds dial at six o'clock occupying nearly half the dial face. The architecture earned the Prince its "doctor's watch" nickname — the large sub-seconds register let physicians count a patient's pulse cleanly off the dial, with the seconds hand running clearly enough to support the "feel pulse, count seconds, multiply" workflow that was the standard medical timing technique of the period.

Dial signatures and configurations documented on surfaced 971 examples:

  • Silvered duo-dial with Arabic numerals: most common.
  • Silvered duo-dial with Roman numerals: period dress variant.
  • Two-tone sector duo-dial: typical 1930s Art-Deco geometric dial.
  • Matte silver with painted Breguet numerals: late-period dress variant.
  • Gold duo-dial on gold-cased examples.
  • Black duo-dial: Phillips Geneva V platinum case 6,013 carries a documented black dial.
  • "Eaton 1/4 Century Club" retailer signature: the Switzer 1907–1932 example replaces the usual Rolex dial signature with Eaton's text. Later Eaton presentations used ref. 1490.

Hand styles documented: blued steel leaf hands (most common), blued steel dauphine, blued steel pencil/baton, blued Breguet-style on dress variants. Sub-seconds hands are blued steel; refinished sub-seconds hands are the most common service intervention on 971s, like the broader Prince family.

Age-related foxing and refinished dials both occur in the surviving record. A clean dial is not proof of refinishing; originality requires comparison of print, finish, hands, movement, and case history.

Authentication

Checks on a 971 should cover the movement, case construction and hallmarks:

  1. Caliber-to-plate-shape match. A 971 should carry an Aegler shaped movement. Rectangular plates indicate Cal. 300 or Cal. 350 (1928–1935 production); tonneau plates indicate Cal. 360 HW (1936-onward). A non-Aegler base movement (Schild, Peseux, ETA) under a 971 dial is a transplant. A Gruen-stamped Aegler movement under a 971 case is a known transplant pattern from the Aegler-Gruen marketing split — Rolex sold to the British Empire markets, Gruen to the United States, and parts crossing markets in service later produced franken-1490s and franken-971s with brand-mismatched movements.
  1. 971A Tiger Stripe alternating-metal ridges. Genuine Tiger Stripe is two physical pieces of gold (yellow + white) separated by raised ridges. Modern fakes engrave a single gold case and rhodium-plate the recessed bands. A Tiger Stripe whose stripes are visibly recessed rather than separated by ridges is suspicious; a side-light examination reveals the difference quickly. The watch-guy.com and VRF documentation of 971A fakes is consistent on this point.
  1. English hallmarks date the case import precisely. Glasgow and Edinburgh assay offices stamped imported watches with year-letter codes; a Glasgow 1929 hallmark dates the case import to 1929, regardless of when the movement was assembled. Cross-check the movement number against the 70k–75k range that corresponds to 1929–1930 silver imports.
  1. 18-jewel capped-endstone bridge. An unusual high-grade configuration on Extra Prima and Ultra Prima movements; its survival on a service-untouched watch indicates originality.
  1. Crown material match. A gold case should carry a gold Rolex crown. A steel crown on a gold 971 is a service replacement.
  1. Caseback engraving style. Period-correct 971 casebacks are factory-stamped. Hand-engraved markings indicate post-factory work — except for legitimate retailer-presentation engravings on Eaton 1/4 Century Club and similar retailer-program watches, which sit alongside the factory stamping rather than replacing it.

Auction record

year venue configuration hammer
1994 Antiquorum Geneva 971U 9ct gold Observatory CHF 11,500
1998 Antiquorum Geneva 971U 9K bicolor Extra Prima 15j CHF 9,775
2005 Antiquorum Geneva Tiger Stripe 18K Glasgow 1929 CHF 18,400
2006 Antiquorum Geneva Tiger Stripe 18K case 65,377 CHF 29,500
2008 Antiquorum NY Canonical Tiger Stripe 971A 18K c.1930 USD 14,400
2010 Antiquorum NY Sterling, English hallmark 1928 (Arman) (Arman Collection)
2013 Antiquorum Geneva Platinum, case 6,077 CHF 35,000
2015 Phillips Geneva Platinum, case 6,047, c.1935 CHF 75,000
2015 Antiquorum Geneva Tiger Stripe 971A case 65,196 CHF 15,000
2017 Phillips Geneva V Platinum, case 6,013, c.1935 CHF 48,750
2017 Bonhams NY 971A 9K white+yellow gold USD 7,500
2018 Bonhams London Sterling silver, Glasgow 1929 GBP 3,750
2019 Sotheby's HK Sterling, case 02,508, Extra Prima 15j (passed est. USD 8–12k)
2020 Antiquorum Geneva Zebra 9K bicolor case 60,206 CHF 10,625
2021 Phillips Geneva XIV Platinum, case 6,013 (third sale) CHF 55,440
2022 Sotheby's 971U stainless steel + 9K yellow gold, manual 15-jewel movement, lot 619 no result reported
2023 Antiquorum Geneva Pink Zebra 18K case 45,950, lot 138 CHF 16,250
2023 Bonhams HK 971A 18K Tiger Stripe c.1938 HKD 70,125
2024 Antiquorum 971U stainless steel + box + papers USD 12,134

The same platinum case 6,013 sold through Phillips three times — 2017, 2019 (relisted), and 2021 (CHF 55,440 hammer, +13.7% over 2017). Cases 6,047 and 6,077 are separate platinum examples; at least three distinct platinum 971s are documented in the auction record. Antiquorum's 2013 catalog noted only the fourth platinum 971 sold through their house at the time, framing platinum 971 production as low single-digit examples.

The auction table contains separate results in different currencies, years, materials, and conditions. Repeated sales of platinum case 6,013 are useful provenance and market observations, but they do not establish a general price trend or a price band for every 971.

Related references

See also the Prince family index, movement reference, bracelet & clasp guide, and serial numbers by year.

  •  
    971 Prince with pink-and-white-gold case
  •  
    18K Tiger Stripe bicolor case
  •  
    9K Zebra bicolor case
  •  
    Platinum 971 with Cal. 300
  •  
    Eaton 1/4 Century Club presentation watch

Sources

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