Sphere Auctions LLCSun Prarie, WI Mynt AuctionsNew York, NY Vogt Auction TexasSan Antonio, TX Gorny & Mosch GmbHMunich, Bavaria Williamson Auction GalleryHollywood, FL S.Y.EL Diamonds LTDRamat Gan, Israel HIGH END GEMS & JEWELS LTDManchester, England 5150 AuctionsGreeley , CO Taylor & HarrisWILMINGTON, CA BUDDSSilverstone Circuit, Northamptonshire S.Y.EL Diamonds LTDRamat Gan, Israel HIGH END GEMS & JEWELS LTDManchester, England Artemis Fine ArtsLouisville, CO Mynt AuctionsNew York, NY 5150 AuctionsGreeley , CO Weatherham Estate TreasuresCobourg, ON Palmer's Auction CoCampbell, NY Hardt Auctions GmbHRadevormwald, NORTH RHINE WESTPHALEN