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Specialists with Bonhams will be joining us on Saturday, May 28, 2022 from 11:00 AM to 3:00 PM for our Appraisal Day and Auction. You don't want to miss this special event!


Aaron Bastian is a Director of Fine Arts at Bonhams San Francisco. He joined the company in 1998. His department holds three sales annually of California and Western Paintings in Los Angeles and San Francisco, and two sales annually of American Paintings in New York, for which Aaron is responsible for conducting appraisals and acquiring property. Aaron has worked on a number of notable estates and collections including the L.D. 'Brink' Brinkman Collection and the Collection of John H. Garzoli.

Before taking his current position in 2007, Aaron was Head of the Fine American Paintings sale at Christie's, where he was responsible for two annual mid-season sales. He worked as a cataloguer in both European and American paintings before becoming a Specialist.

Prior to that, Aaron worked at the Museum of Art and History in Santa Cruz, California, as well as the Sculpture Studio at Baskin Visual Arts in Santa Cruz. He also has an interest in painting restoration.

Aaron is an Auctioneer for Bonhams sales, as well as charitable organizations including The Headlands, Southern Exposure and Root Division. In addition, he is a featured Appraiser on PBS' Antiques Roadshow®.

Aaron was a Regent's Scholar at the University of California, Santa Cruz where he graduated with a BA in History with highest honors.


I am an Auctioneer and Director, Head of Department for Jewelry based in Los Angeles where Bonhams holds several live and online-only auctions throughout the year.

We are currently in a period of consignment, seeking beautiful pieces to offer in our upcoming auctions. So many estates tell a story of the collector and each is different, we can truly sell it all at Bonhams and have a robust international market that is looking to us for standout jewelry.

My latest triumph was the collection from Jill and Byron Crawford which included over 300 lots of art jewelry from artists such as Art Smith, William Spratling, Ed Wiener, Charles Loloma, Betty Cooke, and Pablo Picasso to name a few. The sale was the first of its kind in terms of a single-owner art jewelry sale and in that it sold over 98% of the items and reached new records for many of the artists.


Heather O'Mahony is the Regional Representative for Washington, Montana and Alaska, and is based in Seattle. She joined Bonhams in 2007 and is responsible for sourcing and selling for over 60 collecting departments, facilitating fair market appraisals for private clients, museums, and corporations as well as for the fiduciary community. She regularly conducts appraisal events throughout the Northwest with visiting specialists.

Heather has brought several important collections to market, including the J.Z. Knight Collection and the Tongshao Yi collection, and has transacted in over $24 million in works of art over her tenure with Bonhams.

Prior to joining Bonhams, Heather worked in the Conservation Department for the Seattle Art Museum during the expansion of its downtown facilities and Olympic Sculpture Park. Prior to that, she worked at Sotheby's Seattle office as their local Representative.

Heather received her undergraduate degree in Art History from the University of Washington and also studied at Richmond University in Florence, Italy, specializing in Italian Renaissance and Italian language. She was also accepted into the prestigious internship program at the Peggy Guggenheim Museum in Venice, Italy, in 2005.

She is an active volunteer in the non-profit sector, having served on the Executive Board of the Seattle Art Museum Supporters, Seattle Opera's Gala committee, and is a member of ArtTable and the Henry Art Gallery Contemporaries.

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