I always keep an eye out for sprial clock dial designs as it has always seemed to be a great way to make longer term dials on a clock face.  Jaeger-LeCoultre does it with a 1000 year dial on a limited edition run of their Atmos Du Millenaire Atlantis (seen below).  But the video above from a team in London called Aspiral is the first successful use of the spiral I have seen that allows you to know which rung of the spiral you should read.  Very fun. (Thanks to William Gibson’s twitter feed for this one @GreatDismal)

Jaeger-LeCoultre Atmos Du Millenaire Atlantis