"Melodia Records (MiR)" - a label with almost no reliable information (even its location is doubtful: United Kingdom or Australia?). We only know that it has released two 78 rpms of a Polish Australian artist Andrzej Jędrzejowski (1923-2009), who also has been recorded on Australian labels Carinia and Selecton. Maybe British EPs with logo "Melody and Rhythm (MAR) Rec. Co. Ltd." (also of Australian Polish repertoire) belong to the same company.
--Mike G. Jurkevich