Appraisals & Authentications

Appraisals & Authentications
Often a single item or archive requires an appraisal for donation, insurance or tax purposes. For more than thirty years Lion Heart Autographs has provided autograph appraisals that meet or exceed IRS standards.


Clients have included:


The New York Times
The Library of Congress
The Pierpont Morgan Library
Carnegie Hall
Boosey and Hawkes
The Bessemer Trust
Fritz Stern
Paul Simon
Patrice Munsell
The Steinway Family
The Albert Einstein/Otto Nathan archive
The Estate of Alvin Ailey
The Estate of Howard Ashman
The Estate of Irving Berlin
The Estate of Leonard Bernstein
The Estate of Abe Burrows
The Estate of Walter Cronkite
The Estate of George Gershwin
The Estate of Martha Graham
The Estate of Oscar Hammerstein II
The Estate of Jerome Kern
The Estate of Burton Lane
The Estate of Richard Rodgers
The Estate of Arthur Schwartz

& many more.



David Lowenherz has served as a panelist at the Appraisers Association of America’s National Conference speaking on “The Dealer as Appraiser,” and participated in meetings of the Music Library Association. He has lectured at New York’s Grolier Club and the Four Arts Society in Palm Beach.


Appraisal and authentication fees for archives are $250 per hour with a minimum charge of two hours. Single items or small collections are charged at a flat rate.


To discuss your appraisal needs, please call us at 212.779.7050 or 800.969.1310, fax us at 212.779.7066, or email us at



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