Wikimedi'Òc

The Soviet Union 1968 CPA 3663 stamp (Envelope, Modern Postal Transport and Compass Rose (Letter Writing Week, 10.7–13)) cancelled.jpg - EugeneZelenko

The Soviet Union 1968 CPA 3662 stamp (Stamps CPA 7 и 3191 and Compass Rose (Stamp Day and the Day of the Collector)).jpg - NoFrost

The Soviet Union 1968 CPA 3663 stamp (Envelope, Modern Postal Transport and Compass Rose (Letter Writing Week, 10.7–13)).jpg - NoFrost

The Soviet Union 1968 CPA 3662 stamp (Stamps CPA 7 и 3191 and Compass Rose (Stamp Day and the Day of the Collector)).png - Cmdrjameson

The Soviet Union 1968 CPA 3663 stamp (Envelope, Modern Postal Transport and Compass Rose (Letter Writing Week, 10.7–13)).png - Matsievsky