This Autographed Original 11.5x18 Pencil Hand Drawn Sketch Dated 1/2/80 has been Personally Signed by Greg Hildebrandt of Wonder Woman. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services.The authenticity can be verified on Beckett Authentication Services website. Press Pass Collectibles only offers Authentic Autographs by Greg Hildebrandt through Signings, In-Person Signings or Private Collections to include a 100% money back Lifetime Authenticity Guarantee.