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The Encyclopedia of Horology

Wristwatch · Chronograph

Helbros Invicible Chronograph

Partially verified

This Helbros Invicible chronograph is a stainless-steel wristwatch from the late 1970s. It features a gray dial with applied stick hour markers, steel stick hands, and two sub-dials positioned at 3 and 9 o'clock. The watch is powered by a manual winding Valjoux 7733 movement with 17 jewels. The stainless-steel case measures 35mm in diameter excluding the crown and 41mm in length including the lugs, with a lug width of 17mm. The case back is stainless steel, and the watch displays an outer tachymeter scale graduated up to 1000. It is fitted with a bracelet featuring a double clasp and includes an extra brown leather strap. The movement is reported to have a frequency of 18,000 A/h and a power reserve of approximately 45 hours. The piece has been serviced.

Front view of the Helbros Invincible chronograph featuring a silver-toned dial, dual sub-dials, and a tachymeter scale.
Front view of the Helbros Invincible chronograph featuring a silver-toned dial, dual sub-dials, and a tachymeter scale. — Laurent Fine Watches. Rights pending — permission not yet requested. Original source

Catalogue identity

Source
laurent-fine-watches.myshopify.com
Category
Wristwatch · Chronograph
Maker / attribution
Helbros
Reference
Not recorded
Catalogue / lot identifier
Helbros-Chronograph-V-10-5-2026
Source-reported date
circa late 1970’s
Source-reported place
Not established

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 stainless-steel case with a diameter of 35mm, measured excluding the winding crown, and a total length of 41mm including the lugs. The case back is specified as stainless steel, while the bezel is described in the internal engraving as base metal. The lug width measures 17mm.

The dial is gray and includes gray stick-style indices marking the hours. It is complemented by steel stick hands. The layout includes two sub-dials at the 9 o'clock and 3 o'clock positions, serving as seconds and minute registers respectively. An outer tachymeter scale is graduated up to 1000.

Evidence for this section
  • “SIZE – DIAMETER EXCLUDING WINDING CROWN: 35MM”
  • “It is a stainless-steel case with engraved outside “Base Metal Bezel – Stainless Steel back””
  • “The watch has an outer tachymeter graduated up to 1000 and two sub dials for the seconds at 9 o’clock and minutes at 3 o’clock.”

Movement and Technical Specifications

The watch is powered by a manual winding Valjoux 7733 movement containing 17 jewels. This caliber operates at a frequency of 18,000 A/h. According to the provided information, the movement has an approximate power reserve of 45 hours.

The movement was produced within the 1969 to 1978 period. The auction description reports that the movement has been serviced.

Evidence for this section
  • “Valjoux manual winding movement with caliber 7733, 17 jewels and 18,000 A/h.”
  • “The power reserve is approximately 45 hours.”
  • “The movement was produced from 1969 to 1978.”
  • “The watch is serviced.”

Signatures and Components

The interior of the case is signed with the brand name. The dial prominently displays the Helbros name and the model designation 'Invicible'.

The watch is fitted with a bracelet that includes a double clasp, stated to accommodate a 6.50-inch wrist. An additional brown leather strap is included with the watch.

Evidence for this section
  • “inside Helbros Watches Swiss””
  • “The watch comes with a bracelet and double clasp.”
  • “It comes with an extra brown leather strap.”

Open research questions

  • Can the specific production year within the late 1970s be confirmed via serial number analysis?
  • What is the exact composition of the 'base metal' used for the bezel?

Source evidence

Recorded claims and source quotations for Helbros Invicible Chronograph
FieldSource-reported valueSource quotation
MakerHelbros“BRAND: HELBROS”
MovementValjoux 7733“The watch comes with a Valoux manual winding movement with caliber 7733 with 17 jewels.”
Case materialStainless steel“MATERIAL: STAINLESS STEEL”
Diameter35mm“SIZE – DIAMETER EXCLUDING WINDING CROWN: 35MM”
Jewel count17“17 jewels”
Frequency18,000 A/h“18,000 A/h”
Lug width17mm“Width between lugs is 17mm.”

Visible details

  • Two sub-dials at 3 and 9 o'clock position
  • Gray dial with stick-style indices and hands
  • Case back marked as stainless steel with base metal bezel
  • External tachymeter scale

Research qualifications

  • Origin of manufacture is not specified for the case assembly
  • Specific service history details are not provided beyond the statement that it is serviced

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

Consulted source

ساعت کرنوگراف Helbros Invicible با موتور Valjoux 7733

Reviewed 2026-11-02 · Record b91e2a66dc

Terms in this record

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

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