Complication · Calendar & astronomy
Lunar Cycle Register
Partially verifiedA complication tracking the long-term cycle of the moon, including nodes or apogee/perigee.
Definition
A complication tracking the long-term cycle of the moon, including nodes or apogee/perigee.
Historical origin
Advanced astronomical horology going beyond the simple 29.5-day phase.
How it works
Uses additional gearing to track the Draconic or Anomalistic lunar months.
Can indicate when eclipses are likely to occur.
Pocket watch context
Found in the most complex astronomical clocks.
Wristwatch context
Extremely rare in wristwatches, found in 'Mega Complications'.
Identification
- Indicators for lunar nodes or distance to Earth
Servicing notes
Highly specialized; requires astronomical tables for setting.
General guidance only. Complicated mechanisms should be assessed and serviced by a qualified watchmaker or clockmaker specialist, not adjusted at home.
Related photographs
No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.
Sources & references
- de Carle, D., Watch and Clock Encyclopedia
- Britten, F. J., Old Clocks and Watches and Their Makers
- Horological Journal (British Horological Institute), technical articles
Where sources disagree, the disagreement is stated rather than resolved silently.