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PCE
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DIFF Subgroup
G04C 3/021

Full Title

Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means (clocks driven by synchronous motors G04C15/00) > wherein movement is regulated by a pendulum

Of 1 combined children, 0 exist in both systems.

1 codes are CPC-only extensions.