10 Pfg crown / eagle (strip of three and single stamp, these corner fault) on missionary letter "Vicariatus Apostolicus novae Pomeraniae" (printed on 2 letterheads), stamp HERBERTSHÖHE 6 / 4 97, to Belgium with arrival stamp. The letter contents exists from 2 sheet of writing paper, written in French formal language, and a sheet of writing paper, written seeming in a South Sea formal language. Unusual piece