2 Fr. Chamber of Commerce stamp with "Liberation" overprint mixed franking with 4 Fr. Petain with same overprint on registered letter from "Batz sur Mer 9.5.45" to La Turballe, arrival 11.05.1945 on reverse; stamps overprinted "LIBERATION" as posted after armistice, expert report Lothar Herbst VP (2025) "Condition is sound."