  In this paper the gauge embedding procedure of dualization is reassessed
through a deeper analysis of the mutual equivalence of vector field models of
more generic forms, explicitly, a general modified massive gauge-breaking
extension of electrodynamics and its dual gauge-invariant model we derive in
the paper. General relations between the vector field propagators and
interaction terms of these models are obtained. Further, these models are shown
to be equivalent at tree-level and one-loop physical calculations. Finally, we
discuss extension of this equivalence to all loop orders.
