1.50 Fr. \"marshal Petain\" each with hand stamp overprint \"fortress Lorient\" on cover from \"fortress Lorient 20.03.1945\" to Pornichet with on the back arrival cancel from 28.03.1945, the letter is still to the old tariff of 1, 50 Fr. Franked - there however from 1.03 a tariff of 2, 00 Fr. Counted war the document at the postage for destination about 1 Fr. Later calculated - 0, 50 Fr. False postage and 0, 50 Fr. Postage due, this war with of the French postage due stamp Michel number 73 at the 29.03 receipted, issued only 1.800 examples, expertized Pickenpack and expertise Lothar Herbst VP (2023) : \"the condition is perfect. Very rare ensemble, whereby covers of the fortress Lorient general very rare are\", Michel 1.000.-