8h Austrian-Hungarian postal card fr. add. with 3h stamp canc. "BELGRADE*5.6.18" via "BP.111*6.8.18" and "BP.999.7.8.18". Readdressed to "BP.XX*8.8.18" and return "BP.999*9.8.18". Ausrtian censor cachet "302" in red and Serbian "11" (type IV/A) in black.