1942, army postal service insured letter over RM 1500,- with 5 varnish seals and internal cover with stamp "secret command thing" and mute stamp 8.11.42 and army postal service V label with "Fp XIII" handwritten ( = Navy-post office Gotenhafen 1) as well with service- and cover stamp army postal service no. M 50819 = 22. Lehr flotillas command to the marine artillery ordnance in Gotenhafen, good condition, Michel 800,-, rare