German Reich issue "Pfennig": postal stationery postcard 10 Pfg carmine, question- and answer part still se-tenant, question part with postmark "Halle (Saale) 1a 28. 6. 90" to Heligoland used and the answer part with English circle date stamp "Heligoland JU 29 1890" (type V) return to Halle used, arrival postmark on face from 30. 6. 1890, faultless quality, these double card places an important unique the Heligoland philately dar, detailed photo expertize Schulz BPP: "to my former standard of knowledge an unique. The longstanding Heligoland expert H. Lemberger was such an one copy unknown remained. This time document from the correspondence of the at that time officiating postmaster Hornsmann is surely a large philatelic costliness and Enrichment each Heligoland collection. "