The watch executive owns one of the two Ref. 3448 cased in platinum by Jean-Pierre Hagmann long after the model was discontinued.
Most common strap size on this line: 20 mm Source: Revolution
Jean-Claude Biver's watches
Business1 documented fact
Jean-Claude Biver is documented wearing the Patek Philippe Perpetual Calendar. Each watch below links to its strap size and story.
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