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Extended "O" Roll Scale for Extra Instruments
By Don Teach 

To my knowledge the two extra holes that Durrell Armstrong [PPCo]
dreamed of using were never used.

Don Teach
Shreveport, Louisiana

(Message sent Thu, 13 Aug 2015 12:59:31 -0500 , from time zone -0500.)

Key Words in Subject:  Extended, Extra, Instruments, O, Roll, Scale
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