The difference between these two pairs of "bizarre" medals is that the Soviet medals are authorised for wear with British medals, whereas the Saudi and Kuwaiti medals are not, so you are quite correct in not wearing them Alber! The USSR awarded 40th, and then 50th Anniversary of the Great Patriotic War Medals to survivors of the Russian convoys, many years before their service was recognised by the British authorities by the award of the Pole Star emblem worn on the Atlantic Star ribbon.