German offical postal service Ostland, 6 pfennigs postal stamp with overprint Ostland in mixed franking with 16 and 20 pfennigs postal stamps with overprint Ostland, on correct franked registered cover to Aschaffenburg, registration label with single line cancel "Pleskau" and official seal of the post office Pleskau, cancelled "PCKOB * K * 26 11 43, reverse arrival postmark Aschaffenburg, photo expertize Robert Brunel VP (2025), "the condition is perfect", signed H. B. Zierer