Doar Ivri perforation varieties: Ba #4f 15mil stamp with rare 10:10 perforation on thin yellow paper (as evidenced by the horizontal lacey pattern) using setting A (May 1948 printing, probably from the group 74a per Shabtai, rated as Very Rare), here printed - unusually - on the UNGUMMED side (this issue is usually encountered printed on the gum side), MNH & off center as is typical of this perforation type; expertized by Ising BPP & Dr. J. Gotlib (certificate included).