NDB Malta :

 

listen to 'MLQ' (Rudy van Dalen, 1990)
listen to 'MTA' (Rudy van Dalen, 1990)
listen to 'LQA' (Michael Oexners NDB Handbook, ~2008)

 

here a PPC verifying the callsign 'MTA' (Frank Schüttig, 1983)
this letter and PPC from 2001 verifies 'MLT' to Patrick Robic

 

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Callsigns:
MLQ
MLT
MTA

 

Frequencies Morse Telegraphy:
395
416