1890 (25 May) Heligoland 10pf formular card to Hong Kong, tied by Heligoland double arc cds. Transit San Francisco (10 Jun). Arrived Hong
1890 (25 May) Heligoland 10pf formular card to Hong Kong, tied by Heligoland double arc cds. Transit San Francisco (10 Jun). Arrived Hong Kong (14 Jul). Heligoland is a small archipelago in the North Sea. Incoming mails to Hong Kong are extremely scarce. 1890.5.25 黑爾戈蘭島10芬尼明信片寄香港，銷黑爾戈蘭島雙弧日戳。6.10經三藩市。7.14抵香港。黑爾戈蘭島 。
