The Hotblack Gravitas is the foundation of the Hotblack collection, and offers the same perpetual calendar, automatic daylight light saving and 15 seconds/year accuracy as the other Hotblacks. For an additional calibration fee, it can even be subjected to the Hoptroff London calibration process, an 8-hour ordeal during which the temperature is slowly lowered to 0?C and raised to 50?C while being calibrated with an atomic clock. This increases the accuracy to 1 second/year.
The Hotblack Sports allows you to track a football match live with a subtle glance at your wrist. Once you have selected a match from your iPhone, the top dial shows the home team score and the left dial shows the away team score.