Which timekeeping innovation did Daniel Square introduce?

Daniel Square is notable for introducing the coaxial minute and hour hands, which was a significant advancement in the design and functionality of timekeeping. This innovation allows for greater precision and clarity, as the coaxial arrangement helps to prevent the overlap of the minute and hour hands, making it easier to read the time accurately. The coaxial hands can also enhance the overall aesthetic appeal of the watch face, contributing to both practical use and design sophistication.

While other innovations such as vibrating quartz movement, circular gong systems, and automatic winding mechanisms play important roles in horology, they are not the specific contributions attributed to Daniel Square. His work in improving the layout and operation of the hands on the watch dial is what sets his innovation apart and underscores the importance of timekeeping clarity in horological advancements.