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The Encyclopedia of Horology

Wristwatch · Annual calendar wristwatch

Audemars Piguet Royal Oak Quantième Annuel Ref. 25920BA

Partially verified

The Audemars Piguet Royal Oak Quantième Annuel, reference 25920BA, is an annual calendar wristwatch attributed to production in the late 1990s. The watch features an 18-karat yellow gold construction, including the integrated bracelet and the octagonal 36 mm case, which is secured by eight exposed screws. The dial, finished in dark blue, displays a 'Grande Tapisserie' pattern. It functions via the automatic Calibre 2225/2814, which calculates the varying day lengths of 30 and 31-day months, requiring manual adjustment only at the conclusion of February each year. The time is indicated by central luminous hands, with a red-tipped central hand tracking the date against an outer track, and a month indicator positioned at the 6 o'clock location.

Front view of the Audemars Piguet Royal Oak Quantième Annuel, reference 25920BA, showing the 18k yellow gold case, bracelet, and blue dial with annual calendar indicators.
Front view of the Audemars Piguet Royal Oak Quantième Annuel, reference 25920BA, showing the 18k yellow gold case, bracelet, and blue dial with annual calendar indicators. — Craft & Tailored / Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Annual calendar wristwatch
Maker / attribution
Audemars Piguet
Reference
25920BA
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
circa 1990s
Source-reported place
Switzerland

Source-reported attribution and specifications are not independent authentication. A listing does not establish present ownership, current display, availability or permission to reproduce.

Object description

Case and Dial

The watch is housed in a 36 mm case manufactured from 18-karat yellow gold. An integrated 18-karat yellow gold bracelet complements the case design.

The dial is rendered in a dark blue hue and features the 'Grande Tapisserie' pattern. Readability is maintained through luminous-filled indices and hour and minute hands. A central red-tipped hand points to the date tracked around the periphery of the dial, while a dedicated subsidiary display for the month is located at 6 o'clock.

Evidence for this section
  • “قاب ۳۶ میلی‌متری آن با بند یکپارچه”
  • “تماماً از طلای زرد ۱۸ عیار ساخته شده است.”
  • “صفحه ساعت دارای الگوی «گراند تاپیسری» به رنگ آبی تیره”
  • “عقربه مرکزی با نوک قرمز برای نمایش تاریخ و نشانگر ماه در ساعت ۶”

Movement and Complication

The watch is powered by the Audemars Piguet Calibre 2225/2814. This movement is an automatic mechanism with an integrated annual calendar module. It is engineered to automatically advance the date to account for months with 30 or 31 days.

The only required manual correction for this complication occurs at the end of February each year, when the user must set the calendar forward to March 1st.

Evidence for this section
  • “کالیبر ۲۲۲۵/۲۸۱۴ اودمار پیگه قرار دارد که یک موتور خودکار”
  • “پیچیدگی تقویم سالانه به گونه‌ای طراحی شده که به طور خودکار ماه‌های ۳۰ و ۳۱ روزه را تشخیص می‌دهد و تنها نیاز به تنظیم در پایان ماه فوریه دارد.”

Historical Context and Attribution

The reference 25920BA, introduced in the late 1990s, is identified by the source as the only iteration of the Royal Oak model to utilize the annual calendar complication.

The source provides information based on a listing from Craft & Tailored. While this reference is documented within the brand's history, the current listing does not independently certify the authenticity or mechanical functionality of this specific example.

Evidence for this section
  • “رفرنس ۲۵۹۲۰ که در اواخر دهه ۱۹۹۰ معرفی شد، تنها مدل رویال اوک است که به پیچیدگی تقویم سالانه مجهز شده”
  • “طبق توضیح منبع، اودمار پیگه رویال اوک یکی از تاثیرگذارترین طراحی‌ها در تاریخ ساعت‌سازی است که توسط جرالد جنتا در سال ۱۹۷۲”
  • “این اطلاعات و سابقه به منبع نسبت داده می‌شوند و تأیید مستقل اصالت یا کارکرد توسط زمانیتو نیستند.”

Open research questions

  • What is the specific movement serial number range for the 25920BA reference?
  • Did this reference feature variations in dial color beyond the documented dark blue?

Source evidence

Recorded claims and source quotations for Audemars Piguet Royal Oak Quantième Annuel Ref. 25920BA
FieldSource-reported valueSource quotation
MakerAudemars Piguet“برند: Audemars Piguet”
Reference25920BA“رفرنس: 25920BA”
Material18-karat yellow gold“تماماً از طلای زرد ۱۸ عیار ساخته شده است.”
Case Diameter36 mm“قاب ۳۶ میلی‌متری آن با بند یکپارچه”
MovementAutomatic Calibre 2225/2814“کالیبر ۲۲۲۵/۲۸۱۴ اودمار پیگه قرار دارد که یک موتور خودکار با پرداخت‌های بسیار زیباست.”
Introduction DateLate 1990s“رفرنس ۲۵۹۲۰ که در اواخر دهه ۱۹۹۰ معرفی شد”
Dial PatternGrande Tapisserie“صفحه ساعت دارای الگوی «گراند تاپیسری» به رنگ آبی تیره”
ComplicationAnnual calendar“تنها مدل رویال اوک است که به پیچیدگی تقویم سالانه مجهز شده”

Visible details

  • Case and integrated bracelet constructed from 18k yellow gold
  • Blue dial featuring a 'Grande Tapisserie' pattern
  • Month indicator display window located at the 6 o'clock position
  • Red-tipped central date pointer hand

Research qualifications

  • The source notes that authenticity is not independently verified
  • The source states that information regarding history and provenance is attributed to the provided listing text

Photograph identity and source facts were screened before import; rights clearance remains pending.

Consulted source

ساعت مچی Audemars Piguet Royal Oak Quantième Annuel رفرنس 25920BA

Reviewed 2026-11-02 · Record 2c6cc47357

Terms in this record

Glossary explanations for terms named in this object’s record.

Other annual calendar wristwatch records