Its described as the most complicated mechanical digital watch in the world and consists of 651 pieces. Its apparently the first entirely mechanical watch with a digital display that shows a second time zone.
The mechanically driven digital display is operated by a series of cams and gears, the digital segments are formed from tubes, each segment rotating 90 degrees to indicate the time.
This is a limited edition watch with just 177 of these being made to commemorate the 50th Anniversary of Di Grisogono. Measures 56 x 48 mm