This moon phase display has another important feature, but this time it is more technical. It is the fluid and continuous drive of the disc of the moon via a seven-wheel transmission that is linked to the hour wheel continuum. The Tag Heuer Aquaracer Replica Moon Phase is different from other moon phase displays that jump the disc once or twice per day. It moves continuously with the progression of the day and closely follows synodic times for one lunar orbit around Earth, which are 29 days, 12 hour, 44 minute and 3 second.

In simplified displays of the moon phase, the lunar cycle can be rounded to 29.5 days.Tag Heuer Aquaracer Replica This creates an error of one day in two and a quarter years. The much more complex gearing in Lange's moon phase movement reduces inaccuracy so that it only takes 122.6 year for the difference to equal one day.

Tag Heuer Aquaracer Replica, never one to sit still, introduced the Grand Tag Heuer Aquaracer Replica “Luna Mundi” in 2003. This version is the 41.9mm Tag Heuer Aquaracer Replica in a larger case.

Grand Tag Heuer Aquaracer Replica, "Luna Mundi", 2003

The "Luna Mundi", a limited-edition set of two watches, was created to pay homage to two constellations that dominate the sky in the north and south, Great Bear, and Southern Cross.

The watch industry has neglected the southern hemisphere for many years and has focused on the northern. In reality, the crescents of the moon that increase and decrease appear in mirror images to people from the northern and south hemispheres. The only two moon phases that are the same in both hemispheres are full and new.Baume & Mercier Replica Watches The two versions of "Luna Mundi", which are based on the same watch, feature the Great Bear constellation and the Southern Cross constellation on their dials. For the northern and south hemispheres, the moon discs are rotated clockwise or counterclockwise.

The precision mechanism, which requires only an adjustment every 122.6 year, allows the two hemispheres to be displayed with accuracy.