Good very rare stamp. 
The Six-Day War also known as the June War, 1967 Arab-Israeli War, or Third Arab-Israeli War, was fought between June 5 and 10, 1967, by Israel and the neighboring states of Egypt (known at the time as the United Arab Republic), Jordan, and Syria. After a period of high tension between Israel and its neighbors, the war began on June 5 with Israel launching surprise air strikes against Arab forces. The outcome was a swift and decisive Israeli victory. Israel took effective control of the Gaza Strip and the Sinai Peninsula from Egypt, the West Bank and East Jerusalem from Jordan, and the Golan Heights from Syria.