Bosnia / Serbia 1916 WW1 POW mail: Bosnian 5h p/c with "K.U.K. FELDPOST" (Imperial Field Post) overprint, canc military PO Sabac cds 17.IX.16, & with Austrian censor cachet. From Badovinci, Serbia to Serbian POW held at camp in Bohemia. All of message in pencil. Good condition. Scarce item.