lubricated. One source recommends servicing intervals of: 3-5 years for watches, 15-20 years for grandfather clocks, 10-15 years for wall or mantel clocks, 15-20 years for anniversary clocks, and 7 years for cuckoo clocks, with the longer intervals applying to antique timepieces.

Mechanical movements

A mechanical movement contains all the moving parts of a watch

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