Grandpa sits between the parents.
Grandpa is in the left.
So the American branch of the family found out that the people in the old photos were my great grandfather Israel Sribnik with his family. Israel’s sisters Rachel, Reyzel and Rebecca moved with their husbands to the USA before 1908. Until the mid-1920s, the families corresponded with, but because of the Soviet regime the connection was broken.
Now both parts of the family know of the fate of each other.
The link to this story in my blog in Russian (more family photos):