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The Encyclopedia of Horology

Wristwatch · Chronograph

Omega Speedsonic f300 Hz "Lobster" Chronograph

Partially verified

This Omega Speedsonic f300 Hz, widely known by the collector nickname "Lobster," is a vintage wristwatch from the mid-1970s. It features a distinct stainless steel integrated bracelet with wide links resembling a crustacean's tail. The case measures 43mm by 43mm and has a thickness of 14.5mm. The dial is black with a mirrored finish, featuring chronograph sub-registers and a day-date display. Internally, the watch is powered by the battery-operated caliber 1255, an electronic tuning fork movement oscillating at 300 Hz. The auction report notes that the watch has been recently serviced and is in overall good condition, though the hesalite crystal exhibits minor surface wear. The case back is secured by screws and bears the raised Seamaster emblem.

Frontal view of the Omega Speedsonic f300 Hz, showing the dial, hands, and the integrated bracelet design.
Frontal view of the Omega Speedsonic f300 Hz, showing the dial, hands, and the integrated bracelet design. — Ashton-Blakey Antiques. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Chronograph
Maker / attribution
Omega
Reference
Not recorded
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1974-1975
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 Design

The watch features a 43mm by 43mm stainless steel case that integrates seamlessly into a unique bracelet design. This specific bracelet style, characterized by its wide, tiered links, has earned the watch the common nickname "Lobster" among collectors.

The dial is finished in a mirrored black surface, providing high contrast for the chronograph register hands and the main timekeeping elements. It includes a day-date complication positioned at the 3 o'clock mark and a tachymeter scale printed on the outer track. The crystal is made of hesalite, which the source notes currently displays superficial scratches from previous use.

Evidence for this section
  • “طراحی بدنه و بند متصل آن فرمی مدرن و آینده‌نگرانه به ساعت بخشیده که شباهت حلقه‌های بند به دم لابستر”
  • “صفحه ساعت مشکی با پرداخت آینه‌ای (Mirrored dial) بوده و در وضعیت بسیار مطلوبی توصیف شده است.”
  • “شیشه ساعت از جنس هزالیت (اکریلیک) است که روی آن خط‌وخش‌های سطحی ناشی از استفاده دیده می‌شود.”

Movement and Functionality

The timepiece is powered by the caliber 1255, an electronic tuning fork movement operating at 300 Hz. The movement is fitted with 12 jewels.

According to the report provided, the movement has undergone a full service to ensure functionality.

Evidence for this section
  • “قلب تپنده ساعت، کالیبر 1255 مجهز به ۱۲ سنگ قیمتی است که با باتری کار کرده و از مکانیزم دیاپازونی (Tuning Fork) با فرکانس ۳۰۰ هرتز بهره می‌برد”
  • “برند OMEGA در اواسط دهه ۱۹۷۰ میلادی (حدود ۱۹۷۴/۱۹۷۵) با معرفی این مدل تلاش کرد دقت بالای حرکات الکترونیکی دیاپازونی را با قابلیت‌های زمان‌سنجی کرنوگراف ترکیب کند.”
  • “ساعت به تازگی به طور کامل سرویس شده است.”

Condition and Attribution

The watch is dated to approximately 1974-1975, reflecting the production era of the Omega Speedsonic line. The auction description reports that the overall condition is favorable, with the dial being in excellent shape.

No documentation regarding original boxes or papers is provided with this specific item. It is noted that the information regarding condition and authenticity is based on the seller's report rather than an independent technical verification.

Evidence for this section
  • “بدنه و بند نیز نشانه‌های معمولی و طبیعی فرسایش و خط‌وخش‌های جزئی ناشی از استفاده روزمره را نشان می‌دهند.”
  • “در پشت قاب، درب پیچی استیل مزین به نقش برجسته نشان Seamaster قرار دارد.”
  • “اطلاعات و مشخصات ارائه‌شده در این بخش صرفاً بر پایه گزارش فروشنده و منبع اولیه تنظیم شده است”

Open research questions

  • What is the specific production volume of the Speedsonic Lobster compared to other Speedsonic variants?
  • Are there any known variations in the 'mirrored dial' finish across different production batches of the 1255 caliber?

Source evidence

Recorded claims and source quotations for Omega Speedsonic f300 Hz "Lobster" Chronograph
FieldSource-reported valueSource quotation
BrandOmega“برند: Omega”
ModelSpeedsonic f300 Hz“مدل: Speedsonic f300 Hz”
Case MaterialStainless Steel“جنس قاب: فولاد ضدزنگ (Stainless Steel)”
Movement12-jewel tuning fork electronic“قلب تپنده ساعت، کالیبر 1255 مجهز به ۱۲ سنگ قیمتی است که با باتری کار کرده و از مکانیزم دیاپازونی (Tuning Fork) با فرکانس ۳۰۰ هرتز بهره می‌برد”
Case Dimensions43 x 43 mm“ابعاد قاب: ۴۳ × ۴۳ میلی‌متر (بدون سردسته)”
CrystalHesalite (acrylic)“شیشه ساعت از جنس هزالیت (اکریلیک) است”
Country of OriginSwitzerland“میان علاقه‌مندان به این برند سوئیسی بدل کرده است.”

Visible details

  • Integrated bracelet with distinct wide segments
  • Day-date window at 3 o'clock
  • Screw-down case back with Seamaster logo
  • Chronograph pushers at 2 and 4 o'clock

Research qualifications

  • Presence of micro-scratches on hesalite crystal
  • Unknown state of long-term mechanical parts durability

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

Consulted source

ساعت مچی OMEGA Speedsonic f300 Hz کرنوگراف کرونومتر معروف به Lobster

Reviewed 2026-11-02 · Record 33311578f9

Terms in this record

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

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