The Precise Time-Scale System (PTSS) is a fully integrated, world class timing system capable of providing timing accuracies comparable to the best national laboratories. It can combine up to six high performance cesium frequency standards or Active Hydrogen Masers (AHMs) in a time scale that drives the local Real-Time Clock (RTC) signal. A high performance timing quality GNSS receiver provides the information used to steer the system output to UTC and generate GPS Common-View (CV) data. This allows the frequency standards to be reported to the International Bureau of Weights and Measures (BIPM) for inclusion in the international time scale. The PTSS is a fully integrated solution that provides industry leading frequency stability, phase-noise performance, and time scale availability in a unit as small as one instrument rack.