50 C. postal stamp with overprint "fortress Lorient" in the horizontal pair - of it the right stamp with variety "inverted overprint" in mixed franking with 70 C. and 30 C. postal stamp being a correctly franked mixed franking on cover from "Le palace 16. 4. 45" to La Baule with reverse arrival postmark "La Baule 30. 4 45", without signs, detailed, new 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 of 1. 800 pieces (Michel. No. 4), 300 pieces (Michel. No. 6) and 600 pieces (Michel. No. 2) . The t_te-b_che pair (Michel. No. 4) is especially rare on cover. Covers of the fortress post Lorient are general very rare. "