Courland express letter, used with halved Michel number 4 - in that case left half, sender FP no. 36278 B rod II. And 4.-6. Battr. Kind. Regiment 225 subordinate the 225 ID / 18. Army / Courland, except for \"opening for use good condition\", photo expertize Wilhelm van Loo BPP, Michel 2.000.- - rare! These folded letters served only in the March / April 1945 to the contingent maintenance of the field post traffic through airmail from the Cure country-boiler in the up to then not yet occupied areas Germany's, historical very interesting document!