Stockholm and a statue from the Medici Dossier

Source: Christos Tsirogiannis

Associate Professor Christos Tsirogiannis of Aarhus University has identified a Roman marble statue that surfaced on the Stockholm market. The statue had been spotted by Steffan Lundén who had then contacted Tsirogiannis. The identification was made from one of the images seized from the Medici Dossier. 

The statue was reported to have formed part of the Max Willborg (1933–2001) collection. Willborg ran galleries in London and Stockholm, and part of his pre-Colombian was sold at Christie's in 2001. 

When did Willborg acquire the statue? What other material was derived from the same source?

I am grateful to Christos Tsirogiannis for sharing this material with me.