Sun Clock 3500 B.C.
3500 B.C.
% complete
Water Clock 1400 B.C.
1400 B.C.
% complete
Sand Clock 300 AD
300 AD
% complete
Candle Clock 885
885
% complete
Mechanical Clock 1386
1386
% complete
Pendulum Clock 1656
1656
% complete
Wristwatch 1868
1868
% complete
Atomic Clock 1949
1949
% complete
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