Air Mail cover 1918 (30 July) picture postcard showing "K.U.K. ETAPPENPOSTAMT DURAZZO (DURZ)" c.d.s. showing unframed straight-line "K.u.K. Seeflugstützpunkt Durazzo" h.s. in bluish-black, also a second picture postcard showing unframed straight-line "K.U.K. KÜSTENFLUGSTATION/SEBENICO" in violet, both addressed to Hungary