Gentlemen,
should you already have this information, please ignore my post.
Goerings Uniform (cap, tunics, badges etc.) his Reichsmarschallstab and the Interimsstab are described in UM (Uniformen-Markt 17/1940 (together with the other GFMarschallstäbe).
It says: Interimsstab des Reichsmarschalls. Aus Elfenbein gefertigt, mit goldenen Beschlägen und schwarz-weiß-roter Schnur mit Quaste. Länge etwa 85 cm. Verzierungen auf dem Beschlag: Hoheitszeichen aus Platin, EK. und Hoheitszeichen der Luftwaffe.
Rough translation (hopefully accurate enough - I don't know how to translate the technical terms correctly):
Interimsstab of the Reichsmarschall. Made of ebony with golden fittings and black-white-red cord with a tassel. Length about 85 cm. Ornaments on the fittings: National emblem made of platinum, I(ron) C(ross). and National emblem of the air force.