EAR-Z3 1932 Spain
EAR-Z3 was used by Mr. Emilio Negro, from Valladolid, Spain (EA1), but no EAR plus numbers nor EA callsign issued to this man in my files.
This is a provisional, pirate, callsign in Spain pre 1934 licensing.
The spanish administration issues EAR callsigns from EAR1 to EAR336, after that, all the legal EAR were changed to EA as we know today, from district 0 to 9.
People initially used EAR plus letters (normally identifying name or city) in pre-licensing days.
QSL Courtesy of G4UZN
Info courtesy of EA5BM