The history and production technology make our clock unique. VacuumGlow uses rare indicator lights to display time. Until the 1970s such gas discharge displays were mostly used for information display. Their production came to an end with the LCD development, so today glow-discharge lamps are a rare item in factory warehouses and can even become a collector’s pride. The selection of lamps for VG depends only on the quality of the preserved lamps, not their availability.