The 2020 Summer Sale - Sale 333 Day 3

1969 (Mar 1) Cultural Revolution cover with Chairman Mao's quotation from Yunnan Lancang to Peking,
f.w. W10 single stamp and R13-2c on reverse, tied by Yunnan Lancang cds. VF-F.
1969年3月1日文革語錄封自雲南瀾滄航空寄北京，背貼文10及普票2分票各一枚，銷云南瀾滄惠民（所）日戳。上品。