You are absolutely correct. Nice find. This is a 1970 D quarter dollar struck on planchets punched out of stock intended for dimes. I don't have time to read three pages of posts but wanted to chime in because this was the first error coin that I ever purchased. I bought it from a customer at my brothers gas station when I worked (For $2/hr.) pumping gas. I think I gave him $7 for it and this was around 1973. Not sure what they are bringing today but they are not rare. Scarce, yes.
Then that would be considered a Wrong Planchet and Off Metal Error. If you google 25c struck on 5c you will get many certified examples! Weight of the Nickel planchet would remain the same just struck by Dies intended for a Quarter (Not my coins)
It would weigh the same as a nickel (5 grams +/- .19 grams) and it wouldn't have a "clad sandwich" edge.
Thank you everyone. You guys are awesome! Wealth of knowledge and I'm lucky you all share it with me.
Purchased recently a Half Dollar on Quarter Stock so it was a bit confusing at first. Most error collectors prefer the wrong planchet than wrong stock but it may be stock is more rare. Stock is cheaper than wrong planchet but as we see here the route cause could just be lack of advertising of this error and educational. Interestingly the small auction house I purchased it from just had the half dollar and its lowered weight. Nothing more ... not mention of the word stock or that it may be on a foreign planchet. When XRF confirmed it was CLAD the fact it was on a stock quarter due to its weight was the only alternative left. A tough/interesting analysis. John Lorenzo United States