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Created to improve the legibility of the date, the Cyclops lens is both an aesthetic and a technical brand signature. This Rolex invention was patented in the early 1950s and presented for the first time in 1953 on a Datejust. Its magnifying effect makes the date easier to read. Initially in plexiglass, it has been crafted in sapphire since the 1970s, like the watch’s crystal.