Mexico (Zone 6): This contact with Fifi was made on 20M CW in July 1972. Fifi was my first YL contact with Mexico. Her QSL card says she was a model. Back then the XE0 prefix was given to foreign hams operating in Mexico and was the entry level license for natives. I understand this license only had VHF and above privileges so she may have been a boot legger on the HF bands. From what I can remember about the contact, her CW was good.