Helbros Invicible Chronograph – Valjoux 7733 - SS – 35mm - Serviced

Vintage Helbros Invicible chronograph with gray dial and gray batons marking each hour. 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. The watch comes with steel hands and stick shape. It is a stainless-steel case with engraved outside “Base Metal Bezel – Stainless Steel back” and inside Helbros Watches Swiss”. The watch comes with a Valoux manual winding movement with caliber 7733 with 17 jewels. The watch comes with a bracelet and double clasp. The bracelet fits a 6.50 inches wrist. It comes with an extra brown leather strap. Width between lugs is 17mm. The watch is serviced.

History

The company was founded in 1913 by the Helbein Brothers. The brand established itself as a household name in the U.S. by offering dependable, mid-range watches during the 1920s and 1930s. William Helbein became a major figure in the American watch industry, serving as the first chair of the American Watch Assemblers Association. During the second world war, Helbros shifted focus to support utilitarian needs, producing rugged, military-style field watches featuring high-contrast luminous dials and shatter-resistant acrylic crystals. The company also actively participated in U.S. War Bond campaigns. In the mid-century, the brand gained widespread popularity for accessible dress and sports watches, utilizing reliable Swiss and European movements (such as Lorsa and PUW calibers). In the 1960s, they introduced innovative models like the Lunar Phase watch, which tracked moon phases alongside the time. In the 1960’s, ownership shifted over time—including an acquisition phase by Elgin in the mid-1960s—and the brand continued producing affordable mechanical and quartz watches into the 1990s.

Technical details

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 movement is serviced.

Measurements

Diameter excluding winding crown: 35mm


Length including lugs: 41mm