Perpetual Calendar Clock

##Clock with Perpetual Calendar

Perpetual calendar is one of the representative mechanism of complication clocks and watches. **It shows correct date up to 2099 without correction** because it can handle all kind of month lengths including February of leap years.

###Note
New version driven by a quartz clock movement is released.
https://www.thingiverse.com/thing:5980536

Multi language versions of subdials are at
https://www.thingiverse.com/thing:5986655

###Features

* Mechanical perpetual calendar which is only seen on very expensive watches and clocks
* This clock has four sub-dials to show 24hours, month, date and day of the week
* Ready for practical use. The clock itself is driven electrically and more accurate than mechanical one. No winding necessary
* Easy calendar adjustment by direct manipulation of hands

###Design highlights

* Four sub dials are arranged regularly
* All six hands rotate CW
* Skeleton design to maximize the visibility of the mechan