A so-called "Riechprobekasten" (olfactory test). Used to test the soldiers' sense of smell.
The set consists of six bakelite container. Numbered to the top. Furthermore one medicine bottle as well as two packs of cotton wool. Content not checked! Original field grey painted wooden box. White lettering to the top "Riechprobenkasten - Nicht vor Kenntnis der Gebrauchsanleitung öffnen". "WaA" ink stamped inside. Including the matching key.