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The Encyclopedia of Horology

Wristwatch · Manual-wind wristwatch

Omega Seamaster Manual-Wind Watch

Partially verified

This Omega Seamaster wristwatch, estimated to date from around 1960, features a manual-wind movement, specifically the 17-jewel Caliber 285. The watch case measures 34 mm in diameter and is constructed from stainless steel. It is fitted with a screw-down case back decorated with a central Seahorse emblem. The black dial, which the source describes as professionally restored, contains yellow gold-tone applied numerals and matching hands, including a central sweep seconds hand. The watch is presented on a black crocodile-pattern calf leather strap secured with an Omega-signed buckle. Additional branding is visible on the crown, dial, and case. According to the source, the timepiece has recently been serviced and is in accurate working condition.

Front view showing the black dial, yellow gold-tone markers, and crown.
Front view showing the black dial, yellow gold-tone markers, and crown. — Ashton-Blakey Antiques. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Manual-wind wristwatch
Maker / attribution
OMEGA
Reference
Not recorded
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
circa 1960
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 34 mm stainless steel case with a classic mid-century profile. It features a screw-down case back which bears an embossed Seahorse logo, a defining mark of the Seamaster series. The crown is signed with the Omega logo.

The dial is black and includes applied yellow gold-tone markers and numerals at the 3, 6, 9, and 12 positions. It is equipped with matching yellow gold-tone hands and a central sweep seconds hand. The source specifies that the dial has been professionally restored. The watch is finished with a black crocodile-patterned leather strap and an Omega-signed buckle.

Evidence for this section
  • “بدنه ساعت از جنس فولاد ضدزنگ (استیل) ساخته شده و دارای درب پشتی پیچی منقش به نشان برجسته اسب دریایی (Seahorse) اختصاصی امگا است”
  • “صفحه ساعت به رنگ مشکی بوده و اعدادی با ترکیب طلای زرد، عقربه‌های هماهنگ و عقربه ثانیه‌شمار مرکزی طلایی دارد”
  • “صفحه مشکی ساعت به صورت حرفه‌ای بازسازی (Restored) شده است”

Movement and Functionality

Internally, the watch is powered by a manual-wind movement, identified as the Omega Caliber 285. This movement utilizes 17 jewels to reduce friction.

The timepiece is described as having undergone a recent service, with the seller reporting that it is in good working order. The Seamaster line was originally introduced in the late 1940s and became defined by its robust construction.

Evidence for this section
  • “ساعت به موتور کوکی کالیبر ۲۸۵ مجهز است که دارای ۱۷ سنگ جواهری است”
  • “این ساعت اخیراً سرویس شده و در وضعیت کارکرد مناسب و دقیق قرار دارد”
  • “سری سی‌مستر در تاریخ ساعت‌سازی به عنوان یکی از خطوط تولید بادوام و نمادین امگا شناخته می‌شود که در اواخر دهه ۱۹۴۰ میلادی معرفی شد”

History and Attribution

The watch is attributed to the manufacturer OMEGA and is part of their Seamaster model family. The production period is estimated to be circa 1960.

All information regarding the authenticity and quality of the watch is provided by the seller. The source indicates that branding is present on the crown, case, and dial to verify its identity.

Evidence for this section
  • “دوره ساخت این نمونه حدود سال ۱۹۶۰ میلادی تخمین زده شده است”
  • “بر روی تاج کوک، صفحه و قاب نیز امضای سازنده مشاهده می‌شود”

Open research questions

  • What is the specific movement serial number range to confirm the 1960 production date?
  • Does the case reference number engraved inside the case back match the records for a 1960 Seamaster?

Source evidence

Recorded claims and source quotations for Omega Seamaster Manual-Wind Watch
FieldSource-reported valueSource quotation
MakerOMEGA“سازنده: OMEGA”
Caliber285“کالیبر ۲۸۵ با کوک دستی بهره می‌برد”
Case diameter34 mm“قطر قاب: ۳۴ میلی‌متر”
Case materialStainless steel“جنس قاب: فولاد ضدزنگ (Stainless Steel)”
Movement typeManual wind, 17 jewels“موتور کوکی کالیبر ۲۸۵ مجهز است که دارای ۱۷ سنگ جواهری است”
Dial conditionProfessionally restored“صفحه مشکی ساعت به صورت حرفه‌ای بازسازی (Restored) شده است”
Case backScrew-down with Seahorse emblem“درب پشتی پیچی منقش به نشان برجسته اسب دریایی (Seahorse) اختصاصی امگا است”
Date estimatecirca 1960“دوره ساخت این نمونه حدود سال ۱۹۶۰ میلادی تخمین زده شده است”

Visible details

  • Case back features a relief Seahorse emblem
  • Signed Omega crown visible in profile view
  • Dial markings include 'Omega', 'Seamaster', and 'Swiss Made'
  • Strap includes a signed Omega buckle

Research qualifications

  • The black dial is stated to be a professional restoration
  • Servicing claims and current working accuracy are based solely on the seller's report

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

Consulted source

ساعت مچی وینتیج OMEGA Seamaster کالیبر 285

Reviewed 2026-11-02 · Record a974748ab7

Terms in this record

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

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