Edox Watch Neptunian Grande Reserve Blue 80801-3BUM-BUIN. The Neptunian Grande Reserve models take this recent collection to a whole new level. At the heart of the Neptunian Grande Reserve lies the new calibre 808, boasting a generous 68-hour power reserve (reserve de marche in French). This new feature allows wearers to leave the watch aside for the weekend without the need to reset the time on the first day of the week.