unused -- HONAN: 20c. on 13c. watermarked Hong Kong Martyr and 20c. on 17c. fourth Sun Yat Sen, mint or unmounted mint. S.G. 696a, 700; Chan 684-687

Details
unused -- HONAN: 20c. on 13c. watermarked Hong Kong Martyr and 20c. on 17c. fourth Sun Yat Sen, mint or unmounted mint. S.G. 696a, 700; Chan 684-687