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Throughout the 1970s Rick Kinzbrunner, a mechanical engineer, travelled and spent time with wineries in New Zealand, the USA and France including Stag's Leap, Simi Winery and the owners of Chateau Petrus, the Moueix group.
During his tenure at Etablissement Jean-Pierre Moueix, he was responsible for the production of their line-up of wines from Pomerol and St. Emilion, including the Chateau Petrus.
While Peppercorn's and Sutcliffe's concerns were never proven, and were disputed by Rodenstock, the current manager of Château Pétrus, Christian Moueix, confirmed that the estate has no records of producing imperials during those vintages.