US PATENT SUBCLASS 368 / 154
.~.~ With spring click

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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

139  DF  MECHANICAL TIME BASE {1}
140  DF  .~ Mainspring {7}
154.~.~ With spring click

DEFINITION

Classification: 368/154

With spring click:

(under subclass 140) Subject matter including means which is both a spring and a clicking mechanism.