Helbros Invicible Chronograph
Record status
Individual type · partial
Period
circa late 1970’s
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.
Evidence at a glance
- Linked sources
- 1
- Photograph views
- 1
- Catalogue references
- 0
Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.
Technical characteristics
- Type
- Chronograph
- Maker
- Helbros
- Diameter
- 35mm
- Movement
- Valjoux 7733
- Frequency
- 18,000 A/h
- Lug width
- 17mm
- Jewel count
- 17
- Case material
- Stainless steel
- Maker / attribution
- Helbros
Design
- Visible features
- • 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
- 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.
- 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.
- 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.
Identification
- Source note
- Facts transcribed from the linked source listing or collection record. Attribution and specifications are source-reported and have not been independently authenticated.
Catalogue references
No catalogue numbers recorded. Numbers are only published once transcribed from a verified edition of a standard catalogue — they are never inferred.
Research required
- Research required: Origin of manufacture is not specified for the case assembly
- Research required: Specific service history details are not provided beyond the statement that it is serviced