4 penny to 30 penny welfare 1951, complete set together in properly franked mixed franking with 6 penny and 15 penny posthorn as well 5 penny madonna and 30 penny Röntgen on airmail oversea R letter from "DORTMUND 13.5.52" via Hamburg, New York and Miami to Turrialba / Costa Rica, reverse various transit- and arrival postmark. A fine item with rare destination!