I have to admit I'm much more comfortable with the IBNS standards. I think the IBNS grades allow for more understanding in the way banknotes are handled in daily life, for the use that they see and the relatively short lifespans notes have as opposed to coins. The attempt to graft the Sheldon scale onto banknotes makes little sense. Coins wear in predictable patterns that simply do not exist for banknotes. Each notes lives a unique life and shows it it different ways. Tearing, soiling, staining, fading, creases, folds and graffiti all are unique to each note; no two will ever wear alike and so coin grading and note grading are two wholly different disciplines.