To celebrate the 20th anniversary of their patented Annual Calendar, Patek Philippe released a new model during Baselworld 2016 earlier this year. The new Patek Philippe Annual Calendar ref. 5396G-014 is now offered in a subtly reworked and refined version that logically complements the 21 previous models that have been presented since 1996, not to mention the eclectic gold and platinum variations with different dial designs.