An octagon-drop clock with the words “Seikosha Regulator” painted in gold on the glass door is not rare. It was made in Japan in the 1890s. Seikosha was a clock-manufacturing facility founded ...

“To know when an event occurred, you need a clock. We are that clock,” said Geoff Chester, public affairs officer at the U.S. Naval Observatory, the majority contributor to the international ...

The Navy has awarded a small New York firm a $20 million contract to develop a compact, next-generation mercury ion atomic clock, the Pentagon announced recently. Frequency Electronics Inc., ...