We have more than 70 years of combined experience in the luxury jewelry and international auction worlds. We use our professional expertise to buy, sell and create special pieces for our clients.

Meet the Experts

Henri Barguirdjian

Henri Barguirdjian started his retail career as an assistant buyer at Harry Winston New York in 1986. In 1989, he was named President. Under his tenure, Harry Winston achieved the largest revenue of its history at the time. In 1991, Mr. Barguirdjian was recruited to revamp the venerable French jewelry house of Chaumet in Paris, following its bankruptcy. While at Chaumet, Mr. Barguirdjian brought the company back to profitability in less than two years. In 1993, he moved to Van Cleef & Arpels to oversee the U.S and Asian operations, where he tripled revenues and participated in the sale of the company to the Richemont Group in 1999.

Most recently, Henri led Graff USA as President and CEO, a position he held for sixteen years, during which time he helped cement Graff's international position as the undisputed premier retailer of high jewelry. 

Patricia G.Hambrecht

Patty Hambrecht is a Yale and Harvard educated lawyer who has had a long and distinguished career in the auction and luxury jewelry businesses. Patty was Global President of Harry Winston from 2000 to 2004, where she transformed a family owned business into a professionally run organization and expanded its customer base. Prior to Harry Winston, Patty spent 12 years at Christie’s, first as General Counsel and then from 1995 to 2000 as President of Christie’s North and South America.

Most recently Patty served as Deputy Chairman and General Counsel at Phillips Auctioneers LLC for almost seven years. She is widely credited with elevating the level of professionalism at the firm and positioning the company to become a more competitive player in the international auction business.



Drawing on our network developed over decades of experience in the luxury jewelry and auction worlds, ARCOT sources pieces from all corners of the world. We buy from private clients, dealers and at auction.


ARCOT offers vintage jewelry, works with celebrated contemporary designers and creates individual pieces with clients in mind. Our collaborations include special commissions with  James de Givenchy and Edmond Chin. When ARCOT collaborates with these artists to produce jewelry for us, we give general directional advice but afford the designers creative freedom. We also execute the requests of private clients, often offering practical suggestions to improve the original concept, and we always work with skilled workshops to create the finished product.


We are always mindful of the mandate to offer exceptional value to each of our clients and we keep current with market trends and prices.