Movements:
|
Lange manufacture calibres L901.7 ("Luna Mundi/ Southern Cross") and L901.8 ("Luna Mundi/Ursa Major"); manually wound; adjusted in five positions; twin mainspring barrels; patented outsize date; power-reserve indicator; plates and bridges made of untreated cross-laminated German silver; balance cock engraved by hand |
Number of parts:
|
398 ("Luna Mundi/Ursa Major")
402 ("Luna Mundi/Southern Cross") |
| Frequency: |
21,600 semi-oscillations per hour |
| Jewels: |
54 |
| Screwed gold chatons: |
9 |
| Escapement: |
Lever escapement |
Balance:
|
Shock-proofed Glucydur screw balance, Nivarox balance spring, patented micrometer-screw index adjuster with whiplash spring |
| Power reserve: |
More than 72 hours when fully wound |
Functions:
|
Hours, minutes, small seconds with stop seconds, patented outsize date, power-reserve indicator |
Features:
|
Moon-phase display for Northern Hemisphere with clockwise and Southern Hemisphere with anti-clockwise moon disc rotation for correct presentation of visible lunar orbit. |
| Accuracy of display: |
One day deviation from synodic lunation in 122.6 years |
Operating elements:
|
Crown for winding the movement and setting the time, push-piece for switching the patented outsize date, recessed push-piece for correction of the moon-phase display |
Case:
|
Diameter 41.9 millimeters, 18-carat white gold ("Luna Mundi/Ursa Major") and 18-carat pink gold ("Luna Mundi/Southern Cross") |
| Glass and caseback: |
Sapphire crystal (hardness 9) |
Dials:
|
Solid silver, argenté, with rhodiumed- or pink-gold appliqués, depending on model |
| Hands: |
Rhodiumed or pink gold, depending on model |
| Water resistance: |
30 metres |
Straps:
|
Hand-stitched crocodile strap with precious-metal Lange prong buckle in white or pink gold, depending on model |
| Edition: |
Limited to 101 sets (two watches each) |
