Note that Sc#7 also had two countries HI and US, and 3 values
5c 8c and 13c
CV: $11,000

The only stamp I am aware of with 2 countries, 2 languages and 2 currencies,
is from a Joint Issue Romania and Yugoslavia
20th May 1965
Comm Derdap Hydro-Electric Project Sc#1745
Exists: As a Bi-National Souvenir Sheet (Only one in the world?)
