  We propose a left-right symmetric electroweak extension of the Standard Model
based on the $\Delta \left( 27\right)$ family symmetry. The masses of all
electrically charged Standard Model fermions lighter than the top quark are
induced by a Universal Seesaw mechanism mediated by exotic fermions. The top
quark is the only Standard Model fermion to get mass directly from a tree level
renormalizable Yukawa interaction, while neutrinos are unique in that they get
calculable radiative masses through a low-scale seesaw mechanism. The scheme
has generalized $\mu-\tau$ symmetry and leads to a restricted range of neutrino
oscillations parameters, with a nonzero neutrinoless double beta decay
amplitude lying at the upper ranges generically associated to normal and
inverted neutrino mass ordering.
