Justcarl got it right! Looking through Lincoln Cents by our own coppercoins (Charles Daugherty), is the best book you will find, with an overwhelming amount of information.
As for the second part of your question, If a scope or loupe is needed for attribution, I would surmise that the TPG's use them as well. I don't know that they would need a scope for grading though. I think Coppercoins did mention in another thread though that PCGS will only attribute the Lincoln's that are in the CherryPickers Guide. I would guess NGC and/or ANACS would do others.
As for the second part of your question, If a scope or loupe is needed for attribution, I would surmise that the TPG's use them as well. I don't know that they would need a scope for grading though. I think Coppercoins did mention in another thread though that PCGS will only attribute the Lincoln's that are in the CherryPickers Guide. I would guess NGC and/or ANACS would do others.


















