  We propose possible signatures of `exogamous' combinations between partons in
the different W+ and W- hadron showers in e+e- -> W+W- events with purely
hadronic final states. Within the space-time model for hadronic shower
development that we have proposed previously, we find a possible difference of
about 10 % between the mean hadronic multiplicity in such purely hadronic final
states and twice the hadronic multiplicity in events in which one W decays
hadronically and the other leptonically, i.e., <N_had(2W)> \ne 2 <N_{had}(W)>,
associated with the formation of hadronic clusters by `exogamous' pairs of
partons. We discuss the dependence of this possible difference in multiplicity
on the center-of-mass energy, on the hadron momenta, and on the angular
separation between the $W^{\pm}$ dijets. If it were observed, any such
multiplicity difference would indicate that the W's do not hadronize
independently, and hence raise questions about the accuracy with which the W
mass could be determined from purely hadronic final states.
