A new watch is invented by Dr. M.L. Agrawalof Jaipur with a different concept altogether . This internationally patented watch denotes :-
1. Rotation of Earth on its own axis in 24 hours (a Solar day)
2. Revolution of Earth around Sun in 365'242190 days(a Solar year)
3. Revolution of Moon around Earth in 29.530589 days(a lunar month)
4. Revolution of Moon around Sun in 354.367055 days (a lunar year)
and manay more.
See : http://www.uselwatch.com/index.htm