Audemars Piguet Royal Oak 36mm Tantalum/Rose Gold Ref. Function: Time & Date. Case Size: Approximately, 36mm. Condition: Excellent, some light wear. Notes: Does not include box or papers. Matthew Bain Inc is based in Miami Beach, Florida. Matthew Bain is a world renowned watch collector, dealer and authority on fine vintage and modern watches. International Buyers – Please Note.