Changes to stamp 39190

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April 3, 2019, 2:02 pm UTC . . Stan Shebs . . update - cv -> a
February 22, 2016, 1:33 pm UTC . . Stan Shebs . . update - design observatory -> Tartu University Observatory
December 19, 2011, 4:53 am UTC . . Stan Shebs . . update - denom 12s -> 12s