Lot 303 China

1967 Two large folded airmail covers (faults) from China Publications Centre Peking to Switzerland one bearing 1967 Labour Day 4f and 30f Butterfly tied in combination. Second cover with 1967 Labour Day 8f (Mao Tse-tung and multiracial crowd with text tied with 22f alongside. One has tear at the top, both are folded or split paper with wrinkles, Stamps unaffected, nice commercial use. SG 2354, 2356.