According to a recent source, Huawei will debut the Watch D on December 23, the same day as the Mate V flip phone. This report corresponds to prior reports that the Mate V would be released on the same day.
The new rumor also backs up the original reports concerning the blood pressure sensor, indicating that the Watch D would be a sophisticated fitness tracker. It will be rectangular, according to leaked renders, with two navigation buttons on the right side.
However, keep in mind that this date is only for the Chinese announcement; the gadgets will not be available in international markets until later.