The STS-99 Chronograph follows the first-edition chronometer with the same design and technical specifications as the former space watch. Modified slightly to suit the refined tastes of professionals and collectors, featuring a new 40mm stainless-steel case with sharper lines, detailed trimming and high-polish regions. Notably, the “chronometer” stamp has been removed from the dial, as its Swiss-Made caliber 7750 automatic movement is now regulated and decorated in-house by Towson Watchmakers.