I'm not sure how the person in your link estimated that approx 24 examples exist, but that sounds like a reasonable number for a transitional planchet error. It may be few more based on the number of copper 1943 cents found, but regardless, it certainly isn't in the thousands of even hundreds. The 1965 quarter mintage is approx 1.8 Billion coins. If there are 24 struck on silver planchets, that 1 out of 75 million. The odds of winning the Powerball is 1 in 292 million. So I guess rascal is right, 1 in 75,000,000 is much more reasonable than lotto odds. @Virginia Neering weigh it on a good scale and you'll know for sure. Just don't get your hopes up. And if it turns out to be plated, take it along with $1.75 down to the local convenience store and buy a power ball ticket. Maybe a CT member might be able to give you the winning numbers EDIT TO ADD: I didn't notice that the OP provided the weight in the first post. My bad. You should completely ignore the post that advises you to show it to someone else. It will just be a waste of time since you already weighed it. Once again, sorry if I confused anybody
Huh so taking the look combined with the weight of 5.68. You are saying that members aren't giving the op the correct info? Sure seems like you are the one leading the op wrong here. It is impossible for the coin to be silver. Good luck on your theorys there Rascal.