Amazing Spider-Man #159 FN Signed w/COA Marv Wolfman 1976 Marvel Comics

This is a vintage 1976 Amazing Spider-Man #159 signed by Marv Wolfman with a COA-certificate of authenticity (size is approx: 5 x 8 inches), complete and produced by Marvel Comics. The comic would grade a Fine condition with spine kinks\stressors, a large corner bump top left which transfers to back cover, soft cover creasing that prevents a higher grade. The interior pages are off-white and pages are still supple.