Kiel 4, 30 Pfg registration label with fee function as well 12 Pfg first issue of stamps for Germany after WW II. On registered cover from Kiel 20.2.48 to Blankenburg, there undeliverable with corresponding note ("to the avoidance from delays is indication the street and house number required", "unsuccessful offered. Zustellgeschäft Blankenburg (Harz). " and "consignee in Blankenburg (Harz) not ascertainable. 19 / 3" as well "20.3. return") and returned - interestingly enough was the sender adress interim also from Grevenkrug to Wolfenbüttel stretched, label in perfect condition, stamp partly a little rubbed, interesting return cover that the Confused the direct post-war period impressive allocated, expertized Zierer, Michel 350.-