German postal service Ostland, stamps from Ostland 4 and 50 Pfennig, Adolf Hitler definitive series with overprint Ostland, Mi number 3 and Mi number 16 in a mixed franking, on a correctly franked registered letter, cancelled with the stamp "PCKOB * K * 18 6 43" and with a rear arrival stamp from Prague, excellent condition, photographic finding Robert Brunel VP (2025).