That would be barely out of tolerance. Your scale may be off slightly, the coin could be worn, or it may have been made on a slightly thin planchet. No big deal either way, it would not be out of tolerance enough to matter.
Congrats on finding a silver ‘77-D quarter. Unfortunately as you can tell by this thread, they’re not at all rare and likely worth only silver melt, or about a $1.25.
A true 1977-D 40% silver quarter would be incredibly rare. Here's one from Heritage: https://coins.ha.com/itm/errors/197...eaned-ngc-details-xf-breen-4457/a/1231-3499.s
I can only assume he is thinking about a 40% 1976 quarter which would still be worth more than melt. I couldn't get the value from the HA link, but you can bet they aren't auctioning a $1.25 coin. A 1977-D off metal 40% silver coin has to be very rare and very valuable.
Definitely can get ‘76-S 40% quarters around melt. I was joking about the ‘77-D because there are numerous people in this thread who are convinced they found one which is self-defeating logic; hence the ‘apparently they’re not rare at all...’.
Hello Sirs, Beleive I have located one of these rare 1977-D 1977 D 25C STRUCK ON SILVER-CLAD PLANCHET. coin sounds like no other, middle rim different from outer rims. Has not been cleaned or graded. Is this the rare coin we all wish we had?
Normal quarter that has been in some kind of acidic or corrosive environment. The copper core has been more affected than the outer copper nickel layers.
Yep. When it's got that Oreo-filling effect (copper-nickel clad layers stick out further than the pure-copper core), it's a dead giveaway for acid etching. And yes, a coin that's damaged like that will probably sound different from an intact clad coin.