Edit from April 2025: After comparing scans from this card in 2015 to 2025 - I'm now convinced that this 'fuzzy or blurry' No F scribble isn't a oddity after all. I think it was simply a dirty scanner bed. I didn't wipe the glass clean very often. I'm assuming it's smudge that is obscuring the image. Put a lot of work into analyzing this $1.50 card!
Also - after further review - I never noticed that it appears that every No F scribble card shares the same yellow ink offsets. Never noticed....
Picked this up for $1.50. 'No F' Scribble, but the airbrushed F is fuzzy or blurry. Worth $1.50 to check it out. Pictures show the card and a comparison with a 'normal' 'No F' card. The card also has a decent yellow color shift on it throughout.