Wired synchrounous indicating clocks are supervised hourly and every 12 hours by a master controller. Hourly correction range is 59th minute slow and 55 seconds fast. 12 hour self regulation synchronizes hours, minutes, and second hands. A single motor drives the clock movement while a high impedance magnet coil and unique clutch mechanism provide accurate correction control. The motor and coil operation requires three conductors. Available in 12" or 16" round face configurations, these analog wall clocks are designed and built to provide an accurate, long, trouble free life. Powered by a dependable synchronous motor, this clock has been carefully engineered to take full advantage of the motor's inherent accuracy and durability. The clock has a metal case with a white face that contrasts with its black hands and arabic numerals and markers for easy readability. The second hand is red and the case is finished in a textured black enamel with a no-glare convex crystal.