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The Encyclopedia of Horology

Wristwatch · Diving watch

Blancpain Fifty Fathoms Aqua-Lung 'No Radiations'

Partially verified

This 1960s Blancpain Fifty Fathoms Aqua-Lung, known as the 'No Radiations' model, is a stainless steel dive watch measuring 41 mm in diameter. It features a glossy black dial marked with the 'No Radiations' symbol—a radioactive sign crossed out—which was introduced following the industry transition from radium to tritium luminous material. The watch is categorized as 'triple-signed,' bearing the Blancpain, Fifty Fathoms, and Aqua-Lung branding on the dial. The timepiece is fitted with a rotating bakelite bezel and luminous-filled hands exhibiting gold-orange patina. It operates with a mechanical movement, though the service history remains unknown. The stainless steel case retains its original factory finishes, and the watch is presented on a two-piece handmade leather strap.

Frontal view of the Blancpain Fifty Fathoms Aqua-Lung 'No Radiations' on a black leather strap.
Frontal view of the Blancpain Fifty Fathoms Aqua-Lung 'No Radiations' on a black leather strap. — Zamanito. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
zamanito.com
Category
Wristwatch · Diving watch
Maker / attribution
Blancpain
Reference
Not recorded
Catalogue / lot identifier
Source URL identifies the listing
Source-reported date
1960s
Source-reported place
Switzerland
Source-reported serial
30XXXX

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

Design and Case Construction

The watch features a 41 mm stainless steel case with edges that are reported to maintain original factory finishes. A prominent component of the design is the rotating bakelite bezel, which the source describes as being in excellent condition for its age.

The dial is finished in a glossy black with luminous markers and hands that have developed a gold-orange patina. This visual aging is attributed to the application of tritium, which replaced earlier radioactive materials in the 1960s. The dial is classified as a 'triple-signed' version, featuring the brand name, the model name, and the 'Aqua-Lung' designation.

Evidence for this section
  • “بدنه این ساعت با ابعاد ۴۱ میلی‌متری، دارای لبه‌های پهن و پرداخت‌های اصلی کارخانه است که به خوبی حفظ شده‌اند”
  • “قاب باکالیت اصلی ساعت نیز با وجود گذشت دهه‌ها، در شرایطی عالی قرار دارد”
  • “نمونه حاضر از نوع «سه امضایی» (Triple-signed) است که شامل عبارات Fifty Fathoms، Aqua-Lung و نشان No Radiations می‌باشد”

Technical Significance and Markings

The 'No Radiations' designation serves as a visual indicator of the transition to safer luminous materials in the 1960s. Blancpain incorporated a radioactive symbol with a cross marked over it to communicate the removal of radium from the watch components. This aesthetic choice is considered a specific feature of this model, acting as both a technical reference to safety standards and a design element.

The watch includes the branding 'Fifty Fathoms,' which stems from collaboration with French naval officers Robert Maloubier and Claude Riffaud.

Evidence for this section
  • “تغییر از مواد رادیوم به تریتیوم در دهه ۱۹۶۰، نقطه عطفی در ایمنی ساعت‌های مچی بود”
  • “Blancpain برای تاکید بر این گذار ایمن، نماد رادیواکتیو را با خطی ضربدری بر روی صفحه حک کرد و عبارت «No Radiations» را به آن افزود”

Operational State and Provenance

It is presented on a two-piece handmade leather strap. The source emphasizes that the piece is considered an object of historical interest for collectors of military and diving watches, noting the significance of its factory-original condition and its place within the broader history of Blancpain's diving instruments.

The information provided regarding the provenance and features of the watch is attributed to the auction house/seller. There is no independent verification of the watch's internal mechanics or full history outside of these provided details.

Evidence for this section
  • “این ساعت در حال حاضر زمان را به درستی نشان می‌دهد، هرچند تاریخچه سرویس آن نامشخص است”
  • “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 caliber housed within this 30XXXX serial range?
  • Can the provenance of this specific unit be traced to any military issue or civilian diver records?

Source evidence

Recorded claims and source quotations for Blancpain Fifty Fathoms Aqua-Lung 'No Radiations'
FieldSource-reported valueSource quotation
MakerBlancpain“برند: Blancpain”
ModelFifty Fathoms Aqua-Lung“مدل: Fifty Fathoms Aqua-Lung”
Serial30XXXX“شماره سریال: 30XXXX”
Case materialStainless steel“جنس بدنه: استیل ضد زنگ”
Diameter41 mm“قطر بدنه: ۴۱ میلی‌متر”
Dial colorGlossy black“رنگ صفحه: مشکی براق”
FeaturesTritium luminous“نوع نشانگرها: تریتیوم با پتینه طلایی-نارنجی”
StatusWorking condition“وضعیت کارکرد: در حال کار”

Visible details

  • Bakelite rotating bezel
  • Triple-signed dial: Blancpain, Fifty Fathoms, Aqua-Lung
  • Glossy black dial with gold-orange patinated indices
  • No Radiations crossed-out logo on lower dial

Research qualifications

  • Service history is unknown
  • Authenticity is unverified by the cataloguing body

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

Consulted source

ساعت Blancpain Fifty Fathoms Aqua-Lung مدل No Radiations دهه ۱۹۶۰

Reviewed 2026-11-02 · Record 1e2f7393bb

Terms in this record

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

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