Sotheby's New York are due to auction a giallo antico marble bust of Pan next week (December 12, 2013, lot 51). The estimate is $10,000-$15,000. Dr Christos Tsirogiannis has pointed out to me that a polaroid image of the sculpture was found on the Geneva Freeport premises of Giacomo Medici. The image is stapled to a form for the Hydra Galerie, an outlet linked to Medici (and see also here).
Sotheby's provide the Pan with the following collecting history: "French private collection, Fontainebleau, acquired circa 1975".
What is the identity of the anonymous French collection? What does the association with Hydra Galerie imply?