ET-3AZ 1928 Estonia
ES3CX ( TE2WA, T2X , ESX6C,
ES6C)- Vitali Suigussaar,
ET3AZ ( TE2OL, TE-4L, ES3P) - Karl Olof Leesment and
ET3XY (TE-XX)- Eugen Tumma
were first radio amateurs in Estonia,
first 2 way QSO's in 1924-1925.
Courtesy of ES7GZ