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Npopera . en Npopera on postcard Budapest hu Npopera mai Erkel Sznhz egy es kpeslapon own copy see below unknown PDHUunknown Derzsi Elekes Andor hu this postcard is his own copy and scanned by his you can view the postcard hu here too It can not be cleared up the author Erkel Theatre Postcards of AustriaHungary postcards