How Important is the top of the shield when grading Kennedy Halves?

For example, if you have a Kennedy Half that looks ms66-67ish everywhere except for a scrape on the top of the shield on the reverse, what would that grade? Can a Kennedy ever grade gem with a mark/line/scrape on the shield?
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BTW - David Lange has noted that there was a problem with the sealing machine used in the early 70's.
and it sets us apart from practitioners and consultants. Gregor
We'll use our hands and hearts and if we must we'll use our heads.
Russ, NCNE
Some time in your travels, look at the change in shield size and design over the years. BTW - The bust changed size several times before it was retooled to the low-relief design. (hint - the early years had a fatter head
and it sets us apart from practitioners and consultants. Gregor
and it sets us apart from practitioners and consultants. Gregor
President, Racine Numismatic Society 2013-2014; Variety Resource Dimes; See 6/8/12 CDN for my article on Winged Liberty Dimes; Ebay
the clad Kennedies are available with a clean shield if your standards aren't too high.
The 80-D is likely the toughest and is plagued by scrapes. This coin does show up
fairly clean in rolls but rarely with a nice strike.
Carl: I almost bought some Kennedys from you off ebay, but I don't like paying for the grading fee. Do you ever have raw ones for sale at prices minus grading fees? How about any other coins after 64, or even back to 34 on cents, nickels and dimes?