Poured-Lanz SL 11, the first airship, the at war over England shot down became, from the Britons by mistake as Zeppelin L 21 designates, small piece of cardboard, on that mounted a ring from wire in the diameter 7, 5 cm and 3 mm would strengthen with seal, the Cardboard printed \"This is a genuine Zeppelin Wire from the first Zeppelin brought down at Cufley in Essex September 3 rd 1916\", handwritten supplemented \"L 21\", extreme rare piece