For situations where time is of the essence, choose an Acctim Century 24 Hour Radio Controlled Clock (74457) - accurate down to a fraction of a second. A radio time signal from Anthorn in Cumbria helps ensure the Century's precision quartz movement is always ticking on time. There's a 24 hour track as well - ideal for workplaces that operate outside of normal hours. A thick glass lens protects the face from damage or tampering.