• Jimmy Stewart | Not so wonderful fakes
• The story of Neil Armstrong signed NASA portraits
• Authenticity opinions received through Facebook groups? Out!
• What are Autopen signatures? How to identify Autopens and myths!
• Space Shuttle Challenger Autograph Collecting Tips
• Collectibles Chat Episode 4: Exposing traced autograph scam.
• Collectibles Chat: A Soviet-era postcard book with cosmonaut autographs

• Authenticity opinions received through Facebook groups? Out!
• Operation Bullpen and the Marino Family Forgery Ring: Has anything changed?
• When the “proof picture” proves it's a fake!
• The most valuable astronaut signed photo?
• Neil Armstrong Autograph Study from Zarelli Space Authentication
• James "Jimmy" Stewart: Autopen Signature Study
• Yuri Gagarin, 1st in space, Autograph Study by Steve Zarelli

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