via Seiko G757 5020 Sports 100 | Bond Lifestyle.

The Seiko G757 Sports 100 watch is used by Bond Roger Moore in Octopussy. The Seiko is equipped with a tracking device to locate the Fabergé egg, and is clearly visible several times in the movie: first in Qs lab Bond is already wearing the watch before Q explains what it can actually do, and later it is used to track the Fabergé egg.