Art and Antiques Appraisal and Valuation Expert Witnesses

Internationally recognized expert on Firearms History and Values. Consulting, appraisals, expert witness services, and museum exhibit design. Retired director of NRA Museums Division, overseeing 3 national firearms museums & curating NRA's 10,000 gun collection.

Writing & Media - Editor of leading price guide Standard Catalog of Firearms. Author of hundreds of articles and nine firearms books.  200+ national TV appearances as Gun Expert.

Attorney (inactive)  J.D.  AGI certified firearms appraiser.

Jack Holowczak is a Luxury Goods Authentication and Valuation Expert and USPAP-compliant Personal Property Appraiser. As Founding Director of PROVENANCE, he has examined 2,000,000+ items across 50+ luxury houses since 2016 — Hermès, Chanel, Louis Vuitton, Goyard, Chrome Hearts — with documented counterfeit and superfake detection protocols.

He serves counsel in counterfeit, trademark, insurance, estate, customs, and criminal matters in all U.S. and Canadian jurisdictions. Fees never contingent.