This a Larousse French dictionary from 1939. In the appendix it lists all the then current flags of the world in alphabetical order. You’ll notice that for Germany at that time the flag was the Nazi one replete with Zwastika which proves that this was pre-1945 ( before 1945) ! .
Now, alphabetically, look for the Palestinian Flag. YES , there is one. What does it look like? Surprised? Oh, but you thought (Mandate Jewish) Palestine