The Spanish Cross is very similar in shape to a Maltese cross. In its center is a swastika, and between each arm of the cross there is the "Luftwaffenadler", coats of arms, and two crossed swords (they aren't in the non-combatant version). Diamonds are placed around the swastika in the highest ranking of these awards. The reverse side is plain and has a pin used for wearing the cross on the uniform.
The Spanish Cross in Gold with Diamonds was the highest rank of the decoration. It was awarded to those who showed great leadership skills in battle or great merits.
28 gold crosses with diamonds were awarded. (Sperrle, Volkmann, Richthofen, von Thoma, Mehnert, Harlinghausen, Wolff, Harder, Lützow, Mölders, von Moreau, Neudörffer, Schellmann, Schlichting, Balthasar, Bertram, Enslen, Galland, Hoyos, von Kessel, Kraft, Oesau, Seiler, Stärcke, Boddem, Fehlhalber, Henrici, Runze)