Left panels: CMD of the stars enclosed in the reported annulus for the target clusters B292 and B350. Overplotted on the CMD there are the 80% and 50% completeness levels (dotted lines) and an isochrone from the Girardi et al. (2002) dataset with age and metallicity corresponding to the spectroscopic estimates by P05 (see Tables 2 and 3); the red giant branch is plotted with a thick continuous line and the asymptotic giant branch with a thin dashed line. The reddening and distance moduli are taken from Fig. 7, below. Right panels: CMD of the field stars in the neighborhood of the cluster. The area of the considered field is reported in units of the area of the annulus shown in the left panels (A).