new game: What's wrong with this picture

I only have Scotts

 

Do you all conceed defeat?

 

and I am the best Exchanger............

 

....and you all love me?

 

Like to give hints tu7k?

 

The stamp has such a famous error that the previous hint made it a giveaway, unless you simply did not know.
I thought one of the Steve's would get it???

 

I don't have the SG Catalogue, either. Soo..I agree with Zararina. HINT!

 

Where is the hint?

 

Come on tu7k.
Another guess, the shade of color?

 

Up for this thread.

 

It is a cosmetic error?

 

I don't know, Tu, It's your stamp...you tell us if it's a cosmetic error?

 

Lack of blusher

 

Now that's close, come on Steve check your Gibbons.

 

Dont have one, I use a scotts on disc, out of date but it works for me

 

Repeating Zararina's earlier suggestion: is it a colour error (Wrong shade or similar)

 

Any update here tu7k?

 

It is the famous neck mistake. If you look you will see the blemish and it makes the stamp worth many times more the perfect one