China PRC 1967/68, cultural revolution, two iconic air mail...

China PRC 1967/68, cultural revolution, two iconic air mail covers Canton to London: Maos theses W1 gold/red strip-5 with Maos poems W7 8 f. Loushan pass and 10 f. Mao doing poems, and WII (2) Mao and Li Piao tied “Canton 1968.11.5” cover sligth bends. And Maos poems W7, nine all-different values on large part cover tied “Canton 1968.10.28”. Rarities. (T)

https://www.philasearch.com/en/i_9081_377827/2245_China_PRC/9081-A41-333.html?breadcrumbId=1533130278.7059&row_nr=32

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