Luftpostbriefkasten

== German == === Etymology === From Luftpost +‎ Briefkasten. === Noun === Luftpostbriefkasten m (strong, genitive Luftpostbriefkastens, plural Luftpostbriefkästen) airmail mailbox ==== Declension ==== === Further reading === “Luftpostbriefkasten”, in Digitales Wörterbuch der deutschen Sprache‎[1] (in German)