The “BTTF Numeral GRAFIX” watch face is based on a promotional watch that was sold for the release of “Back to the Future Part II“.
It features the digital watch font, where the current hour is displayed around the face, and the current minute is in the center. The colors are taken right from screen-grabs of the time circuits in BTTF. The face is also pretty low power, with an OPR of just 2.3%.