17 opera records recorded live in real time. This person must have worked at a radio station or just  a real opera buff. They cut out the newspaper articles the day after the performances  with the critics reviews .  These records should play OK but there is no guarantee.   I think that they are 78 RPM The newspaper clippings make this very interesting. The dates are from the 1950's and 1960's.  Auction is for all 17 records.