Hi,
This watch belongs to a friend who asked me if I think if it is a gen or rep, but I am not a big Cartier guy really. As far as I can tell -if a rep- it is a good one.
The movement is fully functional and the sweep is pretty smooth -both the chrono seconds and the seconds at 9 o'clock seem to have a good sweep with high frequency, though I cannot tell how many bph.
The only thing that caught my eye is this: When the chrono is working, the minutes will jump not exactly when the seconds hand crosses top center, but around two seconds too early. Obviously a new gen Cartier would not do this, but this watch is several years old. Could it be a gen and still have developed such an issue?
Finally, can he take this watch to an authorized dealer for authentication? If it turns out to be rep, is there a risk they'd confiscate it?