Tombstone of Zissl Königsberg, probably Petr Weber's grandmother

This is a photograph of the tombstone of Zissl Königsberg, who was most likely my grandmother, the mother of my mother, Lola Preiss, née Königsberg. But I don't know when this photograph was taken. According to information that I have at my disposal, apparently the brother of this Zissl Königsberg was Jehuda Shlomo Kellman. So her maiden name would then have been Kellman. From the same source of information, my mother's grandmother was named Chana Kellman, née Weiser. She apparently died in 1929.