Changes to stamp 74634

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May 26, 2020, 6:38 am UTC . . Stan Shebs . . update - perf unset -> 13.5x13
March 23, 2019, 6:41 pm UTC . . Stan Shebs . . update - cv -> a
October 31, 2011, 3:16 am UTC . . Stan Shebs . . update - denom 18s -> 18s