Russia #907-08 Tehran Conference - 1943 Mint Set of 2

In late 1943 the "Big Three", Stalin, Roosevelt and Churchill, met for the first time at the Soviet embassy in Tehran to commit to a united front against the Axis powers of Germany and Japan, planning invasions of Japan and occupied France. Unusual for Soviet-era stamps, this set pictures the American and British flags flying with the Soviet flag! (Russia #907-08)