Orion Moon is a wristwatch by Martin Braun.

Astronomical watch by Martin Braun with automatic winding, retrograde hands date, a photorealistic moon phase indication and moon phase indicator.

The difference to conventional moon phase indications is that at this watch, similar to the Martin Braun Selene, a picture of the moon is printed on the glass with a resolution of 600 dpi. So a realistic representation of the moon is attained. Another special feature is that the moon phase indication can be adjusted to the minute and after 122.5 years differs by only a day.

The moon phase indication indicates whether the moon approaches the full moon or the new moon.