30 C. postal stamp with overprint "fortress Lorient" - variety "inverted overprint" in mixed franking with 1 Fr. and 70 C. postal stamps on correctly franked franked cover from "Le palace 16. 4 45" to La Baule with on the back arrival postmark "La Baule 30. 4. 45", without any signs, photo expertize Lothar autumn VP (2015) : "little tips of the teeth are very tiny shaded, lies in the broad-mindedness, and is characteristic for war record from 1945. the condition is therefore perfect and above average good for this visually very representative cover. The stamps have only a very small issue from 150 piece (Michel. No. 8), 300 pieces (Michel. No. 6) and 600 pieces (Michel. No. 2), here carries the stamp an inverted overprint the on cover very rare is. Covers of the fortress post Lorient are general very rare. "