Piano Rolls
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Paper rolls, generally 11 1/4 inch wide. Well preserved ends should angle the paper toward the center where it meets in a tab that will have a hole to connect to the take up roller.
65 note scale introduced in 1896 with 6 holes to the inch on center. Rolls had pins on end.
88 note scale introduced in 1900 with 9 holes to the inch on center.
72 note scale introduced in 1902.
In 1909 United States standardized on the 88 note scale.
