  Electroweak dipole moments of the top quark are conjectured and their effect
in polarized $e^+e^-$ collisions is examined for the expectation values of two
different $CP$-odd observables. One of these observables probes the real part
of the dipole moments whereas the other probes their imaginary part. It turns
out that varying the polarization of the electron beam substantially enhances
the resolving power of the experiment. PostScript version: preprints/mpi9454.ps
from gluon.hep.physik.uni-muenchen.de
