Unissued Chinese stamps from the 1968 Cultural Revolution period, titled "Great Victory of Cultural Revolution", are displayed at an auction preview in Hong Kong January 27, 2010. The stamps depict Chairman Mao Zedong (L) and his second-in-charge Lin Biao. The set is expected to fetch $640,000-770,000. Reuters Pictures logo Reuters Pictures 24 months ago

Unissued Chinese stamps from the 1968 Cultural Revolution period, titled "Great Victory of Cultural Revolution", are displayed at an auction preview in Hong Kong January 27, 2010. The stamps depict Chairman Mao Zedong (L) and his second-in-charge Lin Biao. The set is expected to fetch $640,000-770,000.