Tonight I got my QSL no. 450 from Latin America, which happened to be XEHHI Radio Uno, Hidalgo del Parral (Chihuahua) 640. Quite a nice station for this jubilee! Very nice email received from Hector Gabriel Lujan, who is both gerente and locutor at the station.
XEHHI was heard during KONG15 in October. This email arrived two months after I sent my letter to Hidalgo del Parral.
Thanks to Henrik Klemetz who made several phone calls to the station to be sure this was the "Radio Uno" I had heard, as two stations with this name were listed on 640.