Bulova Precisionist Collection is the worlds most accurate watch with a continuously sweeping second hand. Most quartz watches are accurate to 15 seconds a month Bulova Precisionist is accurate to 10 seconds a year. The key is Precisionists unique three-prong crystal, which produces a vibration frequency of 262.144 kilohertz (kHz), eight times greater than the usual two-prong crystal and the highest of any watch available today.