It is documented that the Prince (with knowledge of the Dutch Government) had bribery money worth 30 million Guilders, diamonds and a high Dutch Order in his suitcase. It is not known exactly what and how, but that there was a hand-over of diamonds to Evita Perón was true. This was shown in a documentary, I don't remember which one. Probably in the series "Andere Tijden" (Other Times).