Left panels: chromosome maps for all our Type II clusters, color-coded with our derived metallicity, ranging from the median minus 0.3 (blue) to median plus 0.3 dex (orange). The arrows show the directions of the metallicity slopes and their lengths indicate a change of 0.15 dex. Right panels: metallicities as function of a pseudo-color ΔA along the arrows on the left, color-coded by population. A linear fit to the data is shown as dashed red line. The Spearman correlation coefficient r_S is given for every cluster.