i've seen no flaws or sandpits on this pipe and have no idea how Charatan did their grading. In the 1951 Catalogue Crossgrain/birdseye is assigned to the Special grade. I have the impression that Charatan mainly focused on straight grain (and birdseye on the rim). We should ask Ken Barnes about the grading system.... Rarity, Belvedere, Perfection, Special, Distinction, Distinction Deluxe, After Hours, Executive, Executive Extra Large, Selected, Selected Extra Large, Supreme, Supreme S, Supreme 100, Supreme 150, Supreme 200, Supreme 250, Supreme 300, Coronation, Royal Achievement, Crown Achievement, Summa Cum Laude.... not to forget the sandblasts, freehands (FH) and the size groups (1 - 4) whereby the grading becomes still more complicated. E.g. a Belvedere group 4 is higher graded than a Special group1. Obviously dosn't the grain pattern matter that much in this case.
How can a human beeing differentiate all this?