Earlier quoted context omitted.
It seems to me that a lot of people on HN are assuming that this design is an intentional rip-off. It's entirely possible that whoever did the icon didn't realize that they had seen a clock like that before and thus didn't realize they might infringe on someone else's trademark.
That's really unlikely. Those clocks are famous, especially among the types of people who would be in charge of designing a clock at Apple.
(Disclaimer: I am not an Apple fan.) As for the design itself, there is the blatant copying of the seconds hand, but otherwise it seems whoever did it took some care to differentiate the apple clock from the original. E.g. how the lengths of the hour and minute hands relate to the radius of the clock and the size of the hour and minute tick marks. Then of course there are obvious implications of being viewed on a tiny 4" screen. Whether that is enough to build a legal defense on, I have no idea.