Running into rare birds like the Patek Philippe Perpetual Calendar Split-Seconds Chronograph ref. 5372P-010 is not an easy task. A rare bird in platinum that commands top dollar around the $650,000 USD mark. This grand complication from Patek Philippe represents the true pinnacle of watchmaking and it is a watch that is the ultimate grail for savvy watch collectors. For many, the ref. 5270P is the game-over piece, but once you’ve held a ref. 5372P, then you know that this is the true game-over piece.