What makes the Patek 5980 so special?
Why it’s so special. The most significant discerning factor of this watch is the fact that it houses the patek philippe caliber ch 28-520 c fus, making it a chronograph watch. This caliber was significant in horology for its automatic winding mechanism and cutting-edge design. A-010. The patek philippe grandmaster chime ref. A-010 is arguably the most difficult patek philippe watch to obtain. Released to celebrate the brand’s 175th anniversary, this timepiece features 20 complications, making it one of the most complex wristwatches ever made.