HERB RITTS Quadtone Photo Engraving. Type Of Print: Quadtone Photo Engraving (Fine four ink lithographic printing process). By HERB RITTS. Subject: Barbra Streisand, Bel Air,1991. This COA contains a unique serial number and small corresponding tamper proof hologram with matching serial number affixed to the backside of the print mount board with archival adhesive.
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