Trip cam is not another name for setting lever. I am not certain that "trip cam" is what Omega called the part I refer to. This is a circular disc which has a "finger" (spring) that projects outward from the rim of he disc. This disc turns back and forth on a stand-off screw which acts as an axle. This disc turns back and forth as the stem is pulled to the third position. Each time the stem is pulled out, the spring on the edge of the disc advances the date ring. That spring in known to break off, frequently.
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