DIFF Subgroup
G04B 19/266 Full Title
Indicating the time by visual means ( by electric lamps G04C17/02; display arrangements in general G09F) > Clocks or watches with indicators for tides, for the phases of the moon, or the like
G04B 19/266 Indicating the time by visual means ( by electric lamps G04C17/02; display arrangements in general G09F) > Clocks or watches with indicators for tides, for the phases of the moon, or the like