on the carrera's. seems like every year has a different movement. anyway, looks like the 1964 12hour w/ the valjoux 72 seems to be a favorite? not sure why though. any insight into which movements, or years produced are favored. just trying to get ahold on where and why the values are placed. thanks in advance. sorry, i'm sure this has been covered many times over, just wished i hadn't missed it.

j.h.