Do old radium watches still glow?

The question that often arises among collectors and enthusiasts alike is: "Do old radium watches still glow?" This curiosity stems from the historical use of radium in watch dials during the early 20th century. Radium was prized for its ability to emit a faint glow in the dark, often referred to as "luminosity." However, over time, the radioactive decay of radium leads to a decrease in its ability to emit light. Therefore, the glow of old radium watches has significantly diminished, if not completely disappeared. While some may still exhibit a faint glow under specific conditions, it is generally accepted that the majority of radium watches no longer retain their original luminosity. This is due to the natural decay process of radium and the passage of time.