  In this paper, we present preliminary results of the determination of the
charm quark mass $\hat{m}_c$ from QCD sum rules of moments of the vector
current correlator calculated in perturbative QCD at ${\cal O} (\hat
\alpha_s^3)$. Self-consistency between two different sum rules allow to
determine the continuum contribution to the moments without requiring
experimental input, except for the charm resonances below the continuum
threshold. The existing experimental data from the continuum region is used,
then, to confront the theoretical determination and reassess the theoretic
uncertainty.
