Cosmopolitan is the main label of Anatolij Mirosznyk, Ukrainian Australian composer and pianist. His Cosmopolitan Record Co. operated in the 1950s and had released about one hundred records, mostly performed by Ukrainian and Russian artists who came to Australia after the WWII as displaced persons.
Series of the records (continued from the original label Olympia) are R0nn (Russian) and U0nn (Ukrainian); if the label is printed entirely in Cyrillic, U0nn becomes У0nn. One or two initial characters in these indices can be (and usually was) separated by a hyphen, i.e. R0nn can also be represented as R-0nn or R0-nn (or even RO-nn, because the typeface in use has no distinction between digit "0" and letter "O"). There were two variants of label desing: either with stars and planets or (later) with a globe. See also http://78rpmrecord.com/labelview.cfm?whichTask=Search&searchFor=Cosmopolitan and especially comments under http://78rpmrecord.com/labelshow.cfm?whichLabel=9209