Clock with moon dial

Compass watch of the mechanically or electromechanically driven

Device for determining time of sunrise and sunset

Digital sundial

Display module for watch movement

Display of changing moon on watch face

Display of changing moon on watch face

Electronic calculation watch with digital display

Electronic digital display watch having solar and geographical f

Electronic sundial apparatus

Electronic tide meter, method for calculating a high/low...

Geographical chronological device

Globe clock device and methods of making and using the same

Globe maps and derived products

Heliochron

Horometric arrangement for indicating the position of the planet

Islamic prayer calculator/clock device

Lunar phase display mechanism

Mechanism for displaying the moon phases

Method and device for displaying a moon image cycle, in...