We present flux-calibrated integrated spectra in the optical spectral
range (3600-6900 A) of Galactic open clusters and Magellanic Clouds
(MCs) stellar clusters obtained with the 2.15 m telescope at "Complejo
Astronómico El Leoncito" (CASLEO, San Juan, Argentina). Age and
foreground reddening were simultaneously derived by comparing the
continuum distribution and line strengths of the cluster spectra with
those of template spectra. The present data will let us to upgrade the
spectral library of solar-metallicity and MCs metallicities which will
be useful for several astrophysical applications.