Amazing Spider-Man #158 FN Signed Marv Wolfman w/COA 1976 Marvel Comics

This is a vintage 1st printing 1976 Amazing Spider-Man #158 signed by Marv Wolfman with COA-certificate of authenticity (size is approx: 5 x 8 inches), complete and produced by Marvel Comics. The comic would rate a grade of Fine condition with spine stressors and corner wear and a dirty back cover, which prevents a higher grade. The comic book has complete interiors and are off white.