It is well-known that Helmut Sinn marketed the Heuer Bundeswehr Chronograph. However, few are aware that Helmut Sinn also had other Heuer chronographs and even Heuer Rallye Timers in his portfolio.
What many people may not know is that in the 1960s, Helmut Sinn served as a timekeeper at Formula 1 Grand Prix races and recorded times for Heuer.
Jack Heuer granted him a special permission, allowing him to sign and market Heuer Rally Timers with his Sinn logo. These Rallye Timers from Heuer, featuring the Sinn logo, were sold at racetracks and in his shop at Rödelheimer Parkweg 6, exclusively to very loyal customers.
Due to the similarity of his chronographs to Heuer's, differences arose between Helmut Sinn and Jack Heuer during their ongoing business relationship, and in the 1970s, they terminated their collaboration. Despite this, Helmut Sinn continued to market some models with his logo, giving rise to the Sinn 128 in the Heuer Carrera 2447 case.
Helmut Sinn and His Collaboration with Heuer
Heuer Carrera 2447 Scew-Back case and black dial and three big white subdials. The 30-minute and 12-hour subdials at 3 and 6 o'clock, the permanent seconds subdial at 9 o'clock. The movement is a manual wind Valjoux 726 calibre and signed under the balance.
Case Referenz 2447
Serial number 6 digits starting with 104 XXX.
- Case Diameter: 36 mm
- Overall Height: 12 mm
- Lug Width: 18 mm
- Manual Wind Chronograph
- 60s, 30min, 12h
- Column Wheel
- Small Seconds
- 17 Jewels
- 21.600 A/H