Two questions, Is there a Conversion from North - Spink, or Vice versa?, & anyone wanna Attribute

This groat, and give opinion on grade?
Spink #, North #

Thanks in advance.
And is there anyone on here that would attribute a 100 or so coins by pics with grade for a price?

 

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Henry VI Trefoil issue Groat minted in London between 1438 and 1443. This is S1910 I believe having the trefoils at shoulders instead of fleurs.
Grade I think is Fine to Fine+. Value in 2011 Spink F=90, VF=275.
North I think is N1499 Type F Class C.
There is no direct correlation between Spinks and North numbers unfortunately!
As to attributing and grading 100 coins - it would depend how much you are paying, and how quickly you wanted answers! (It takes time and I have other things to do with my life!) PM me.