Fortis Watch Aeromaster Old Radium Day Date 655.10.28 L.08. Old Radium, a beige colour, mixed with particles of Superluminova. In fact, this expression comes from the long history of wristwatches, when radium was added to the dials to make them glow. Todays Old Radium is a homage to the good old days. Vintage meets the perfection of modernity.