CHINA - British P.O. 1917-20, group of three Hong Kong ‘China’ overprinted covers, minor fault 2c & 10c, showing 16 cent rate from Swatow, registered cover franked by 8c. and 12c. from Canton to USA and 1917 registered cover from ‘Chemins de Fer De L’Etat Chinois / Ligne du Lung Hai’ sent to Holland at 26c. rate Censored,with fine ‘Tientsin B.P.O.’ handstamp. registration in red. very scarce trio. SG 2/7. (Photo). Est. 600 - 800 CHF.