Very bright and shiny. Would could cause this weight discrepancy? Thicker than other quarters from the same year. Top coin in the reverse comparison pic. Leaves are stamped weird.
Hi Imho, not every blank weighs the same. I believe it is still with in weight tolerance. https://en.numista.com/catalogue/pieces55.html
It is my understanding that quarter manufacturing tolerances are ± 0.227 g so it's just outside. I've seen certified errors listed as struck on thick planchet. Wondering if that might be the case.
I agree that yours is within weight tolerance. Normal is 5.67 Yours is 5.9 There is a difference but not much. Here is a heavier than normal example from my collection -
What can cause the coin to be bigger size ? Thicker planchet ?so there could be more out there ? Thank you for your time
Is it at all possible that the thicker quarter that you have started out as a proof and at some point was cast out into general circulation? I ask because I've come across two quarters in general circulation which were obvious proofs since they still were in relatively good shape and still had frost on them. I also notice these two that I have come across also seemed to have a thicker appearance compared to other quarters. Were proofs made anywhere other than in San Francisco? I don't see a mint mark on yours. Below is a picture I took of the 1984 proof that I found. It looks much different compared to regular 1984 quarters, thicker and more square in shape.
Not in 1974. Thickness at the edge is more a function of striking pressure than anything else. A stronger strike allows for more complete filling of the edge and rim and thus a thicker edge. The two strikings at higher pressure is why the proof coins have such a thick squared off edge even though they start with planchets the same size and weight as the business strikes. That is why trying to judge the "thickness" of a business strike by looking at the edge doesn't really tell you anything. A thin planchet with a strong strike can be thicker than a normal or possibly even a thick planchet with a weaker strike.
Quarters weigh 5.67 and while 5.9 is a tad heavy, it's not really a big deal, since it is still in spec at the upper end of the tolerance range, and who knows how precise your scale is. It could be 5.85. Paddy's coin is way out of spec, always the more the better with errors.
You can also have the problem that if your scale only one decimal place, the high end tolerance weight for a quarter is 5.897 which would show on a one place scale as 5.9 As Michael says it could be as low as 5.845 and it would show as 5.9
5.67 +/- 0.23 grams for clad washington quarters. 5.9 is at the edge of unacceptable weight, but it's still in tolerance. No idea of the last time you calibrated your scale and your graduation on it is 0.1g which isn't ideal to figure out if it's out of tolerance or not, I mean it could be 5.94 or 5.95 with that graduation, even if absolutely certain the scale is calibrated and reading accurately enough, it can be off by half a gram because it rounds to the tenth of a gram one way or the other to display the weight.