1944, fortress Lorient, army postal service cover with postal stamp GRÖBENZELL and notation "no. 27 23.7.44" to a Wachtm. In the unit army postal service no. L 52857 ( = 5. Battr. Luftsperr battalion 207) in the fortress Lorient as well with stamp "at sender adress return / undeliverable", legitimate condition, Michel 50,-