Hubble Space Telescope CMDs of NGC 6352 with Victoria isochrones and ZAHBs and a MESA HeCB evolutionary track. Panel a: Full CMD. Parameters equal for all models are given in the top left corner. The black dashed arrow is the reddening vector. Panel b: Zoom onto the RHB. Squares and star symbols mark 1G and 2G stars, respectively. Stars with spectroscopic measurements are marked with squares, with purple corresponding to 4900 K, blue to 4950 K, green to 5000 K, and yellow to 5050 K. The F606W − F814W colours of the corresponding temperatures are marked with vertical lines at the top border. The lowest luminosity RHB star is marked and dashed lines extending from it are used to estimate the HeCB mass at their intersections with ZAHBs. The sloped dashed line is along the reddening vector.