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The Encyclopedia of Horology

Wristwatch · Annual calendar regulator

Patek Philippe Annual Calendar Regulator reference 5235/50R-001

Partially verified

The Patek Philippe Annual Calendar Regulator, reference 5235/50R-001, is an automatic wristwatch characterized by its regulator-style display. The timepiece is housed in an 18K rose gold case measuring 40.5 mm in diameter, featuring a polished bezel and a signed crown. The dial exhibits a two-tone black and gray aesthetic with a vertical brushed satin finish. It incorporates a regulator layout with separate recessed sub-dials for hour and minute indications, supplemented by a central seconds hand. Apertures at the upper portion of the dial display the day and month, while the date is indicated in a window at the base. The movement is the automatic caliber 31-260, which utilizes a micro-rotor to provide power for the annual calendar complications. The watch is fitted with a black alligator leather strap secured by an 18K rose gold pin buckle.

Frontal view of the Patek Philippe Annual Calendar Regulator reference 5235/50R-001 showing the regulator dial, apertures for calendar functions, and rose gold case.
Frontal view of the Patek Philippe Annual Calendar Regulator reference 5235/50R-001 showing the regulator dial, apertures for calendar functions, and rose gold case. — Analog:Shift. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Annual calendar regulator
Maker / attribution
Patek Philippe
Reference
5235/50R-001
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
Not established
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 features an 18K rose gold case measuring 40.5 mm in diameter. It is designed with a polished bezel and a signed crown. The crystal protecting the dial is made of sapphire.

The dial uses a regulator layout with a two-tone black and gray color scheme. It features a vertical brushed satin finish. Two recessed sub-dials are used for hour and minute tracking, while the day and month are shown in windows near the 12 o'clock position, complemented by a date window at the bottom.

Evidence for this section
  • “بدنه این ساعت با ظرافت تمام از طلای ۱۸ عیار رزگلد ساخته شده و دارای قطر ۴۰.۵ میلی‌متر است.”
  • “صفحه ساعت با رنگ‌بندی مشکی و خاکستری و پرداخت ساتنی برس‌خورده عمودی”
  • “چیدمان رگولاتور شامل دو صفحه فرعی فرو رفته برای نمایش ساعت و دقیقه است.”

Movement and Complications

The watch is powered by the caliber 31-260, which is an automatic movement. It is equipped with a micro-rotor to maintain the profile and efficiency of the caliber.

The movement drives the annual calendar complication, which includes displays for the day, month, and date, integrated into the regulator layout.

Evidence for this section
  • “قلب تپنده این ساعت، کالیبر 31-260 است؛ یک موتور اتوماتیک با روتور کوچک”
  • “انرژی مورد نیاز برای نمایشگرهای پیچیده تقویم سالانه را با ثبات کافی تامین می‌کند.”

Strap and Clasp

The watch is paired with a black alligator leather strap which features the brand's signature. The strap is fastened using an 18K rose gold pin buckle.

The strap and buckle assembly is reported to follow the manufacturer's luxury standards for finish and materials.

Evidence for this section
  • “این ساعت با یک بند چرمی تمساح مشکی که دارای امضای برند است عرضه می‌شود.”
  • “قفل این بند از نوع پین‌باکل (سگکی) از جنس طلای ۱۸ عیار رزگلد است”

Open research questions

  • What is the specific production date range for this reference?
  • How many total units of the 5235/50R-001 were produced?

Source evidence

Recorded claims and source quotations for Patek Philippe Annual Calendar Regulator reference 5235/50R-001
FieldSource-reported valueSource quotation
Reference5235/50R-001“رفرنس 5235/50R-001”
Case Material18K rose gold“بدنه این ساعت با ظرافت تمام از طلای ۱۸ عیار رزگلد ساخته شده”
Case Diameter40.5mm“قطر ۴۰.۵ میلی‌متر است”
MovementCalibre 31-260“قلب تپنده این ساعت، کالیبر 31-260 است”
Dial finishVertical brushed satin“پرداخت ساتنی برس‌خورده عمودی”
Strap typeBlack alligator leather“بند چرمی تمساح مشکی”

Visible details

  • Regulator dial layout with recessed sub-dials for hours and minutes
  • Vertical brushed satin finish on the main dial surface
  • Apertures for day and month located adjacent to the hour sub-dial
  • 18K rose gold pin buckle fastener

Research qualifications

  • The exact production date is not provided in the source text
  • The source notes that authenticity and functional status have not been independently verified by the platform

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

Consulted source

ساعت مچی پاتک فیلیپ Annual Calendar Regulator رفرنس 5235/50R-001

Reviewed 2026-11-02 · Record 62649da351

Terms in this record

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