10 C. \"Merkur head\" with hand stamp overprint \"fortress Lorient\", variety double overprint, one of it inverted\", 40 C. \"Merkur head\" with hand stamp overprint \"fortress Lorient\" and left attaching likewise overprinted blank field, 50 C. \"Merkur head\" with hand stamp overprint \"fortress Lorient\" with right attaching and also overprinted blank field and 1 Fr. \"Marshall Petain\" with hand stamp overprint \"fortress Lorient\", variety \"inverted overprint\" as properly franked mixed franking on cover from fortress Lorient 10.04.1945 to La Baule with arrival postmark on the back from 20.04.1945, issues Michel number 1 only 650 examples, no. 3 only 180 examples - of it only approximate 10 % with blank field possible, no. 4 1800 examples - hereof only approximate 10 % with blank field, Michel number 8 150 examples, expertise Lothar Herbst VP (2023) : \"the condition of the stamps is perfect. The letter point at slight use- / transport traces on, as well a vertical letter fold trace outside the stamps. Very rare ensemble, whereby covers of the fortress Lorient general very rare are. \", Michel 8.300.-