It seems like A and B are fairly evenly preferred, as are X and Y. My older watches are A/X, while I'm getting used to my new one that is B/Y (with extra markers for local noon and sunrise/set).
@th Midnight at the bottom has the nice property that the hour hand points in a direction symbolic of (even if often not corresponding to) the sun's position.
@th Midnight at the bottom has the nice property that the hour hand points in a direction symbolic of (even if often not corresponding to) the sun's position.