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70th Anniversary (in 1972) of the Panamerican Health Organisation 1973
Airmail Stamps (May 11, 1973)
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Sc C391 / YT PA501%20of%20the%20Panamerican%20Health%20Organisation%201973/19730511.Airmail%20Stamps/C392.jpg)
Sc C392 / YT PA502%20of%20the%20Panamerican%20Health%20Organisation%201973/19730511.Airmail%20Stamps/C393.jpg)
Sc C393 / YT PA503%20of%20the%20Panamerican%20Health%20Organisation%201973/19730511.Airmail%20Stamps/C394.jpg)
Sc C394 / YT PA504
%20of%20the%20Panamerican%20Health%20Organisation%201973/19730511.Airmail%20Stamps/C391.jpg)
Sc C391 / YT PA501%20of%20the%20Panamerican%20Health%20Organisation%201973/19730511.Airmail%20Stamps/C392.jpg)
Sc C392 / YT PA502%20of%20the%20Panamerican%20Health%20Organisation%201973/19730511.Airmail%20Stamps/C393.jpg)
Sc C393 / YT PA503%20of%20the%20Panamerican%20Health%20Organisation%201973/19730511.Airmail%20Stamps/C394.jpg)
Sc C394 / YT PA504