Feldpost letter from Hellerup 20 October 1942 to SS Schütze Svend Lüthj at FP 45060C. On back stamped 'Modtagelse nægtet/Kbhvn.Ø.Distr.' and straight line 'FELDPOST KASTELLET' and blue crayon 'Retur Hellerup' and due '20' øre for which a 20 øre PORTO stamp has been affixed and canceled 'KØBENHAVN Ø.8 4.OMB 20.10.42'. Rare feldpostmark 'FEJDLPOST KASTELLET.