
It is written in Greek letters:
PROKLAMATSIA
NA ELLINOMAKENTOSKI KOMITET
OT ATINA
ZA NASITE BRATE MAKENTONΤSI
The language is the Macedonian language, translated into English it says:
PROCLAMATION
OF THE GREEK MACEDONIAN COMMITTEE
FROM ATHENS
TO OUR BROTHERS THE MACEDONIANS
Please notice the picture of Alexander the Macedonian.
