After selling for well over its estimated price, this 1957 Omega Speedmaster Broad Arrow has become the most expensive timepiece in the watchmaker’s history. The reference 2915-1 is a historically significant model, being the first chronograph to feature a tachymeter scale on the bezel. Made for just two years, it includes a 38mm stainless case with Speedmaster engraved on its slated edge and a tropical dial that’s aged to a chocolate brown. The luminous material on the signature Broad Arrow hand has taken on a golden hue, while the oval “O” Omega logo and a metal bezel add to the watch’s unique elements. With its distinctive features and beautiful patina, it’s no surprise this holy grail Speedmaster is now the priciest piece in the archives.