Coronation Stamp

Ethiopia 1930. Coronation Symbols. Notice the Star of David on the right side of the stamp, as part of the coronation symbols.

Dr. Steven Carol wrote in his article titled
The Lion of Judah and the Land of Judah: Ethiopia and Israel, The Historic and Philatelic Link

Another emblem of the Ethiopian royal house, worn also by the Emperor's Guard, was the Jew­ish Shield of David (Magen David)- the six-pointed star - which was called the "Shield of Sol­omon." The Lion of Judah and the Shield of Solomon both are featured as symbols of the empire on the set of seven stamps issued November 2, 1930 (Scott Nos. 210-216), to commemorate the cor­onation of Haile Selassie as Emperor of Ethiopia.
Thirty-six years later, the Shield of Sol­omon was again visible on a set of three stamps (Scott Nos. 463-465) is-­sued on November 1, 1966, to commem­orate fifty years of Haile Selassie's leader­ship. The basic design depicts a map of Ethiopia, the Emperor seated on his throne, and a curtain from which dangles the Shield of Solomon.

How to Break a Window

in 1991 Iranian government issued this postal stamp for WORLD CHILDREN'S DAY. It is hard for me to accept the fact that there are in our world STATES that preach violence to their children so bluntly.
BTW
The boy's clothes are painted with the Palestinian flag colors.

Moshe Dadon Micro-Calligraphy

Picture is courtesy of Moshe Dadon from Safed, Israel, and it shows a Star of David on the background of Micro-Calligraphy of the entire text of Song Of Songs and Ecclesiastes.

Hex Sign

Picture of Hex Sign Hexagram is copied from Wikipedia

Hex signs are  found on Pennsylvania Dutch barns since 1830's

It is important to note that there are many symbols that are called in this name and the six-pointed star is not the dominant

one

See

Hex signs: Pennsylvania Dutch barn symbols & their meaning by  Don Yoder, Thomas E. Graves, 2000