Certificate of authenticity issued by Centro Studi Mafai Raphäel in date 30 March 2012.

Archived by Centro Studi Mafai Raphäel with the number 194305P12.

This work includes a personal dedication by Mario Mafai to Countess Mimì Pecci Blunt, collector and owner of the gallery La Cometa in Tor de’ Specchi.