What role did John Arnold play in the evolution of watches?

John Arnold made significant contributions to the field of chronometry, which is the science of precise timekeeping. He was particularly known for his work in improving the accuracy of pocket watches during the 18th century. Arnold developed several advancements in watchmaking that enhanced timekeeping precision, including the use of metallic hairsprings and other innovations that allowed for greater regulation of time. His dedication to creating more accurate watches laid the groundwork for the future of horology and influenced subsequent generations of watchmakers.

While he is not credited with the invention of the wristwatch, the self-winding mechanism, or digital timekeeping, his influence on chronometry was pivotal in the overall evolution of timekeeping devices. His work helped establish standards for measuring and keeping time, contributing to the advances in watchmaking that followed.