1912 Overprinted 'ROC' in regular style char. on Postage Due 4c blue block of 4 with bottom sheet margin, unmounted. Chan D36. Est. HK$400-500 (Image1)

Est. HK$400-500

1912 Overprinted 'ROC' in Sung style char. on Postage Due 2c and regular char. on Postage Due 2c, both in block 8, unmounted and skip gum. Chan D25, D35. Est. HK$500-600 (Image1)

Est. HK$500-600

1939 (11 Dec.) A postage due postcard from Tientsin to USA, bearing SYS London 2nd print 5c and surcharged 10c on 25c on SYS London 2nd print, tied by bilingual ‘TIENTSIN’ cds, with USA postage due stamps 3c red, tied by double oval cancel in black, no destination and date type. Underneath ‘POSTAGE DUE 3 CENTS/SEATTLE, WASH.’ in 2 straight violet. Est. HK$600-700 (Image1)

Est. HK$600-700

1941 (30 Jan.) An incoming Postage Due cover from Harbin to Hankow, on front tied by ‘HARBIN’ Japanese type cds, 'HARBIN.POSTAGE DUE' black frame in Japanese, on reverse with HK Commercial Press Postage Due 2c x 3, tied by bilingual 'HANKOW23.2.41' cds, one stamp missing. Est. HK$1,000-1,200 (Image1)

Est. HK$1,000-1,200