There has been mention of Chicago blues players playing Just Intonation tuning with prewar harps.When did Hohner change to there present tuning? Is pre-war pre Germany's war or U.S.? How did the classic Chicago blues players get these prewar harps to last so long? I know there are people on this list who tell what kind of harp SB1&SB2&Walters Big&Little are playing.NOT ME!