Becchina and a Sardinian boat-shaped lamp

Entry from the Becchina archive
Courtesy of Dr Christos Tsirogiannis

Associate Professor Christos Tsirogiannis has identified a Sardinian boat-shaped lamb in the seized Becchina archive with what appears to be same piece shortly to be offered at auction in London.

Why does this matter? The archive clearly shows that the lamp passed through Palladion Antike Kunst in 1993. (We note that the value at SFr 60,000 shows that the piece has clearly lost its value over the years.) Yet the auction house claims that this passed into an Austrian private collection after being acquired in Vienna in the 1960s. Now, the 1960s would conveniently place the lamp in the period before the 1970 UNESCO Convention. 

But is the history supposed to be something like this? Sold in Vienna in the 1960s; acquired by an Austrian private collection; sold through Palladion Antike Kunst in Switzerland in 1993; acquired by an anonymous individual or corporate body; consigned for auction in London.

Here are the questions. Was the current vendor unaware that the lamp had passed through the hands of Palladion Antike Kunst in the 1990s? Had the auction house checked the history of the object or had they accepted the oral account? Which Vienna gallery sold the lamp in the 1960s? What is the authenticated documentary evidence? Finally, who consigned the lamp to Palladion Antike Kunst in the 1990s?

We presume that the auction house has contacted the Italian authorities.

A Sardinian boat-shaped lamp from an "old Austrian collection"

Sardinian boat-shaped lamp. 
Left: Bonhams.
Right: Becchina archive (courtesy of Christos Tsirogiannis)

The sale of antiquities at Bonhams (7 December 2021) includes a copper alloy Sardinian boat-shaped lamp (lot 83). It has an estimate of £2,000-£3,000.

The history of the piece (or as some would continue to say, the "provenance") is stated as:

Private collection, Austria, acquired in the 1960s in Vienna.

But how can this be? The same lamp appears to have passed through the hands of Palladion Antike Kunst in 1993 and appears in the Becchina archive (with date 12-2-93). Incidentally the lamp sold for SFr 60,000. 

Who supplied the history of the piece to Bonhams? What sort of due diligence did Bonhams conduct as part of the cataloguing process? How reliable is the information that the lamp formed part of an old Austrian collection? 

Will Bonhams be contacting the Italian authorities about the lamp and its appearance in the Becchina archive?

I am grateful to Associate Professor Christos Tsirogiannis for making the identification from the Becchina archive, and for providing information on this lamp.