EI on 500kHz CW

At 0020UTC on the morning of Thursday 26 July, I heard the end of a 500kHz CW contact between Finbar, EI0CF and a station he called "John" whose call I did not hear. Finbar was 559 and "John" was 439 in the static. Finbar has subsequently informed me that he was working EI6DN in Dublin. EI is a new country for me on this band.