unused -- KIANGSI: 20c. on 28c. olive, Hong Kong Martyr, watermarked, mint with the usual dull gum. S.G. 699, Chan 718. Photo

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unused -- KIANGSI: 20c. on 28c. olive, Hong Kong Martyr, watermarked, mint with the usual dull gum. S.G. 699, Chan 718. Photo