Explore the fascinating history and dangers of radium dials in this lecture by Kathleen McGivney, COO of RedBar Group and Director of Operations at the Horological Society of New York. Delve into the discovery of radium, its early medical uses, and the tragic story of the "Radium Girls" - dial painters who suffered from radiation poisoning. Learn about the evolution of luminous materials in watchmaking, from radium to modern alternatives, and witness comparisons of different luminescent dials through video demonstrations. Gain insights into occupational safety improvements and the use of Geiger counters in determining dial authenticity. This comprehensive talk covers the intersection of horology, science, and social history, providing a unique perspective on a controversial chapter in watchmaking.