  We propose a model of "Fundamental Symmetries" leading to a dynamical origin
of mass, based on the concept of "Historical Time" and described by a
relativistic Schrodinger-type equation. In this framework, the matter spectrum
is obtained by excitation, at the level of internal structure, of a fundamental
system composed of two constituents, the relativistic free masses of which are
null, with harmonic interaction and a possible null-energy vacuum (ground)
state.
