China (People's Republic), 1967, 8f Thoughts of Mao, in combination with 1967, 8f Mao on Rail on legal size airmail cover to New York City, tied by "Peking, 1967.12.5" cds; cover fold and opening tear through to front not affecting stamps, otherwise Very Fine, a scarce commercial usage. Scott No. 944+954; $500 off cover  Estimate $500 - 750. $0 (Image)