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The Encyclopedia of Horology

Wristwatch · Datejust wristwatch

Rolex Datejust Ref. 1603

Partially verified

The Rolex Datejust reference 1603 is a vintage wristwatch dating to 1975, identified by serial number 393xxxx. It features a silver-colored 'Sigma' dial, indicated by two small symbols at the bottom, which denote the use of solid white gold for the hour markers. These markers are finished with black enamel inserts, coordinating with the luminous plots and handset. The stainless steel case is fitted with a reeded bezel, which is described as intact. The watch is presented on an Oyster bracelet, reference 78360, featuring solid links and 558 end links, with a clasp stamped with the date '1/76'. The mechanical movement has undergone a complete service, and the watch is accompanied by a handmade leather travel pouch.

Rolex Datejust 1603 with Sigma dial and Oyster bracelet.
Rolex Datejust 1603 with Sigma dial and Oyster bracelet. — Bulang & Sons. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Datejust wristwatch
Maker / attribution
Rolex
Reference
1603
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1975
Source-reported place
Switzerland
Source-reported serial
393xxxx

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 Rolex Datejust reference 1603 features a stainless steel case paired with the signature reeded bezel. The source notes that the steel bezel retains distinct, well-preserved grooves, contributing to the overall structural integrity reported for the watch.

The dial is a silver-toned 'Sigma' variant, identified by the specific Sigma symbols placed at the bottom of the dial. These markers designate the inclusion of solid white gold for the hour indices, which are further enhanced with black enamel centers. The luminous material on the dial plots matches the handset, maintaining a consistent aesthetic profile.

Evidence for this section
  • “بزل شیاردار (Reeded Bezel) آن دارای شیارهای مشخص و دست‌نخورده است”
  • “صفحه ساعت با زمینه نقره‌ای از نوع سیگما (Sigma) است”
  • “نشانی که با دو نماد کوچک سیگما در قسمت پایین صفحه مشخص شده و نشان‌دهنده استفاده از طلای سفید توپر در ساخت نشانگرهای ساعت است”

Bracelet and Construction

The watch is equipped with an Oyster bracelet, cataloged as reference 78360. This component features solid links and is secured with 558 end links. The clasp of the bracelet carries a date code engraving reading '1/76', which aligns with the production timeframe suggested by the serial number.

The timepiece is supplied with a custom, handmade leather pouch for transport and storage.

Evidence for this section
  • “بند ساعت از نوع اویستر با پیوندهای توپر (Solid-link) رفرنس 78360 با اندلینک‌های 558 است”
  • “قفل آن دارای حکاکی تاریخ «1/76» می‌باشد”

Movement and Service

According to the source documentation, the mechanical movement of the watch has undergone a complete service performed by the associated workshop.

It is noted that all technical specifications and condition evaluations are based on the original vendor's statements. The cataloging entity has not performed an independent technical verification of the movement's components, historical correctness, or originality.

Evidence for this section
  • “این ساعت توسط ساعت‌ساز مجموعه به طور کامل سرویس مکانیکی شده”
  • “فروشنده همچنین یک سال ضمانت عملکرد مکانیکی برای آن اعلام کرده است”
  • “زمانیتو ارزیابی مستقلی درباره اصالت قطعات، مطابقت تاریخی یا دست‌نخوردگی دقیق این قطعه انجام نداده است”

Open research questions

  • Can the serial number 393xxxx be definitively linked to 1975 production according to Rolex archives?
  • What is the specific nature of the 'complete service' performed on the movement?

Source evidence

Recorded claims and source quotations for Rolex Datejust Ref. 1603
FieldSource-reported valueSource quotation
MakerRolex“این ساعت مچی متعلق به برند رولکس”
Reference1603“مدل نمادین دیت‌جاست (Datejust) با شماره رفرنس 1603”
Date1975“طبق اطلاعات ارائه‌شده از روی شماره سریال 393xxxx به سال ۱۹۷۵ میلادی بازمی‌گردد”
DialSigma dial“صفحه ساعت با زمینه نقره‌ای از نوع سیگما (Sigma) است”
BezelReeded bezel“بزل شیاردار (Reeded Bezel) آن دارای شیارهای مشخص و دست‌نخورده است”
BraceletOyster 78360“بند ساعت از نوع اویستر با پیوندهای توپر (Solid-link) رفرنس 78360 با اندلینک‌های 558 است”
Clasp1/76“قفل آن دارای حکاکی تاریخ «1/76» می‌باشد”

Visible details

  • Silver Sigma dial with white gold indices
  • Intact stainless steel reeded bezel
  • Oyster bracelet reference 78360 with 558 end links
  • Date stamp 1/76 on the clasp

Research qualifications

  • The provenance and exact service history are reported by the source without independent verification
  • Authenticity of individual components is based on the seller's claims

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

Consulted source

ساعت مچی Rolex Datejust رفرنس 1603 با صفحه نقره‌ای سیگما

Reviewed 2026-11-02 · Record 0959358759

Terms in this record

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

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