This appears to have surfaced in Basel in February 1994 and then passed to a New York private collection. It was then being offered by a New York gallery for $8,500.
The District Attorney's office have yet to release the name of the gallery.
I am willing to amend this entry if this collecting history is incorrect or partial.
The kantharos appears to be the one in Royal-Athena Galleries, Art of the Ancient World 28 (2017) no. 105. It formerly resided in the 'J.M.E. collection' in New York.