An amphora attributed to the manner of the Princeton painter

Photo: Becchina Archive
Source: Christos Tsirogiannis

An Attic black-figured amphora attributed to the manner of the Princeton painter has been "passed" by the Artemis Gallery of of Louisville CO (June 10, 2021, lot 0029). (The scholar who made the attribution has not been indicated.) The piece shows, "Both sides present a nude youth riding a horse to the right followed by a bird in flight and set between two cloaked confronting figures." 

The history of the piece is presented as follows (although the sequence is not made clear):

East Coast, USA collection; ex-California, USA collection, acquired at Auktion 5, Jean-David Cahn, Basel, 5 September 2005, lot 36; ex-collection, Switzerland (Dr. Gregor Berger, CH-Jona SG, Collection of his father, the late Professor Dr. H.C. Mult Ernst Hern (1928-2006) - former Director of the Basel Museum

However, Christos Tsirogiannis has identified the amphora from the Becchina archive.  He suggested that Becchina sold the amphora at Christie's (Geneva) on May 5, 1979. If so, is this the unattributed amphora ('Horseman between onlookers, bird' on both sides) noted on the Beazley Archive (BAPD 2495)?

What is the sequence of this amphora? Could we suggest the following?

Becchina; sold in Geneva by Christie's (May 5, 1979); Professor Dr. H.C. Mult Ernst Hern (1928-2006), former Director of the Basel Museum; inherited by Dr. Gregor Berger; sold in Basel, Jean-David Cahn (September 5, 2005); California collection; East Coast collection.

When did this amphora leave the tomb (hence, 'intact and quite excellent') in which it was placed?