NDB Hradec Kralove :

 

listen to this recording from 2008, identifying correctly as 'UR' (rb)
here you can listen to the negative keying 'INE', resulting from a loss of carrier power while modulating the 'real' callsign on the sidebands (rb, 2012)

 

QSL by PPC (Patrick Robic, 1999)

 

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Callsigns:
INA (negative keying)
INE (negative keying)
UR
URE

 

Frequencies Morse Telegraphy:
422