A coin struck on a planchet punched out of stock that was rolled too thin on the rolling mill is called a rolled thin planchet but as an example, a 1974 quarter was struck on a rolled-thin planchet. It weighs 4.92 grams instead of the normal 5.67 grams (non silver normal weight 5.67). So a silver quarter at normal weight of 6.25 g with a tolerance as mentioned of +/- .19 might allow down to 6.06g or so before it may be worthwhile to consider what else it might be. This does not guarantee it is not something else such as discussed here in this article, but most likely is just within a tolerance difference unless other things stand out to suggest otherwise. An example might be if a weight matches a known foreign planchet finding for that same year when searching auction history.
https://varietyerrors.com/wrong-pla...price-guide/
Edited by datadragon
12/13/2022 10:33 pm