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https://www.youtube.com/watch?v=0h4-Bp2EPBA

Unlike radioluminescent materials, such as paints and pigments using radium, tritium, and promethium, link Super-LumiNova uses no excitant at all. Instead, it incorporates a material known as strontium aluminate, which is an extremely link efficient phosphor that once charged, will glow very brightly initially, and with diminishing intensity for several hours thereafter. (For strontium aluminate link to be an effective phosphor, it must be combined with europium, a non-toxic, non-radioactive chemical element).

The link Jacquet Droz mythology is one that dates back to the 1700s and today's watch the Grande Seconde Email Ivoire J014013201 is inextricably tied to that mythology as the Grande Seconde display is one that link harkens back to the historical watchmaker himself who developed t in order to emphasize link the fast pace of urban life in Europe during the Enlightenment. We'd venture to guess there aren't many "enlightenment-inspired" watches out there these days.