This buckle features the current Coat of arms of Austria which was adopted in 1945. It is best identified by it's broken chains which signify the liberation from National Socialist rule. The sickle & hammer represent agricuture and industry. Just what this buckle was used for (civilian, walking-out..?) I'm not sure.
"Possession, it is true, crowns exertion with rest; but it is only in the illusions of fancy that it has power to charm us." ~ Karl Wilhelm Von Humboldt