Fin Flag

image by António Martins and Dov Gutterman, 08 Jul 2000
Album 2000 says in a note that national flag is painted on the
fin.
Željko Heimer, 17 Jun 2001
The current fin flash is in use since 1948. It replaced the 1933 full rudder
fin flash, which looked like a vertically stretched national flag; its measures
were according to the rudder of each and every plane, so we can’t speak on fix
ratio here.
Dov Gutterman, 09 and 10 Jul 2000