I thought I would bump this thread, as Mr. Cornwell mentioned that a lot had to be withdrawn from the auction for being an obvious fake: Kapon - WINE TALK - WineBerserkers.
If I recall correctly, the lots were priced as if they had perfect provenance or close to it. Without maligning Mr. Grunewald or any posters who were helpful enough to offer information in this thread, it appears provenance was not uniformly perfect.