diminished diatonic- key?

["Harmonica Teacher" <HarmonicaTeacher@xxxxxxx>]

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I tuned up a diatonic diminished from A major reed plates. Db on Blow 1, 5
and 9.
"A" occurs on Draw 3 and 7.

How do you name the key of this tuning?

Robert Hale
"the Duke Of Wail"
Coaching By Telephone
MailTo:HarmonicaTeacher@xxxxxxx
Gilbert, Arizona