EOS is a wristwatch by Martin Braun.

Astronomical watch with automatic winding, which can show the sunrise and sunset times. In order to attain a correct display, each watch is individually adjusted to the place indicated by the buyer. This watch, as common at Martin Braun, is offered in several versions, which differ primarily by the dial and the bezel.

On the left side there is a dial indicator for the times of sunrise, on the right for the sunset times. Since it is an astronomical display, daylight saving time is not considered.