It is now more than five years since Moser introduced the Perpetual 1 as the world’s fi rst watch with the already legendary Flash Calendar. It is still the only watch with a perpetual calendar which can be accessed with consummate ease and only via the crown, and without even having to read the operating instructions. No restrictions whatsoever hamper the adjustment of the calendar forwards or backwards. Not even when the watch itself is on the point of advancing to the next day. Taken together with all its other functions, this watch is still without parallel anywhere in the world.