4, 50 Fr. Fee slip in type Ia on properly franked registered letter from \"Guerande 19.03.1945\" to Batz sur Mer with arrival cancel from 20.03.1945, in perfect condition, issued only 3.500 pieces in 7 types (to current state of research) - the probably all in always same number printed from 500 pieces was printed, detailed expertise Lothar Herbst VP (2023) : \"the condition is perfect. \"