So could the watch really run every day for 50 years without any kind of attention? We would guess the two possible places that might give you trouble over that long a period are the aforementioned keyless works, and the mainsprings themselves, but depending on the mainspring alloys you might actually be able to get away with it. This is not the first watch ever to have no liquid lubricants – we think of the JLC Extreme LAB of 2007, for instance, or the Cartier ID One and ID Two watches, or for that matter the all plastic Tissot Astrolon from the 1970s. But Panerai’s technical solutions are elegant and thorough, and with a 50-year guarantee, it’s standing behind its technology.