Advise on if my error coins are real or man made.

Hello

I’ve collected error coins for awhile and have been looking more into clipped planchets, the blakesley effect and how fading should occur around the clip. I don’t know if I’m overthinking it but after looking at my collection some of my clipped planchets don’t show all of these traits (I think). 

If anyone could advise if they believe any of my coins are authentic mint errors or whether they are post mint That would be brilliant. 

I also have this golden 1966 Half penny?

Thank you everyone for any help!

Take high-resolution photos of the edge on the cutout. Shown this way, it's clearly a garage job. The bows in particular are suspect