Some Glycine Airman models use an innovative "stop-second" system called a "hack system" for accurate time setting.
Application: Piotr Sobota
Other records: Timeline of Watchmaking Innovations
Some Glycine Airman models use an innovative "stop-second" system called a "hack system" for accurate time setting.
Application: Piotr Sobota
Other records: Timeline of Watchmaking Innovations