The retrograde indication is one of my favorite “Because We Can” (BWC) complications. Gears are an amazing invention and have allowed watchmakers to make incredible creations. Simple gear systems leave a multitude of openings for creativity. Look at some great examples of it here!
Imagine that you are stranded on Mars. That’s the premise of ‘The Martian,’ a novel by Andy Weir. The watch by Cyrus that will bring us to the red planet is the Klepcys Mars, an awesome dual retrograde timepiece with a miniature rotating Mars beneath the crystal. Though you’ll have to read the book or wait for the movie to know how Watney deals with his situation, one of the cool details of this Klepcys is the three-dimensional Mars that makes one full revolution in a Martian day.