Do you know what this is? It's a "celestial watch" which, in case you didn't know, keeps perfect celestial time as the face rotates in real time.You can precisely tell the placement of the stars just by using the watch’s many measurements and rotating the dials. (I'm lucky if I know what time zone I'm in so this is not a good choice for me.)

A limited edition, there are also versions in yellow (200) and handsome blue (300.) These Astrodea models from Citizen, including the Moon Age and the 2007 “small” versions, are available at Trends in Japan. $585 for the large version; $449 for the smaller one.