3. rare example
"It's one for the connoisseur, with a time-capsule of
untouched pre-World War I aircraft, plus a rare example
(from the 1970s) of the world's only production jet-
powered biplane," says Oakey of the PZL M-15
Belphegor.
4. non-government funded
Pima Air & Space Museum is the largest non-
government funded aviation museum in the United
States.