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https://nikitushkinandrey.wordpress.com/2015/08/15/15-%d0%b0%d0%b2%d0%b3%d1%83%d1%81%d1%82%d0%b0-1923-%d0%b3%d0%be%d0%b4%d0%b0-%d0%b1%d1%8b%d0%bb%d0%b8-%d0%b2%d1%8b%d0%bf%d1%83%d1%89%d0%b5%d0%bd%d1%8b-%d0%bf%d0%b5%d1%80%d0%b2%d1%8b%d0%b5-%d0%bc%d0%b0/
15 августа 1923 года были выпущены первые марки СССР