Just to clear up some confusion as to the use of Tritium on some Panerai dials. All the submersible 1000m range use Tritium on the dials because Super-Luminova is not good enough to be consantly visible when diving at extreme depths, and Tritium does not need to be charged by light. Remember that these watches are serious tools rather than fashion items. Tritium is still used in the watch industry but strict licensing only makes it worthwhile for specific applications - SL requires no licence and is non toxic which is why most makers don't use Tritium anymore.