My Question(s) about 1970 quarter (lightweight)

Ok so hello everybody! Im a newbew, young coin collector and am just a little confused on a few coins. Im hoping you guys can help me! Ok so i was looking through my 1979 and below quarters (ive been starting out by saving everything 1979 and below from the rolls of coins i get (besides halves and dollar coins) and one of my 1970 quarters was significantly lighter than all of the other 1970 quarters. What i have found from my trusty RedBook was that the quarter was actually printed on metal for dimes, but thats all i could find anywhere even on google. Does anyone else have any info they could share with me? and if you could tell me the approxamate value that would be nice. Sorry about my picture taking skills

 

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I can't tell, but I'd assume that the edge is reeded. Definitely not on a dime planchet. How much does it weigh?

Looking at this and your other posts, I can assume that you don't have a Red Book? Lots of info in a Red Book.

 

As far as I can see, there's nothing unusual about the coin. What is the weight of the quarter?

 

@rickmp
I have a red book and it says "lightweight, thin quarters of 1970-D are errors struck on METAL intended for dimes" It was printed on something intended for quarters just using the wrong metal. the redbook doesn't have any more information on that and I was hoping you guys would have some.
@jallengomez
It weighs about 5.5 grams.

 

I'm not a quarter person, but I would think 5.5 grams would be close to being within the normal tolerance range. It could possibly be struck on a slightly thin planchet. Wrong metal is certainly not the only reason a coin could be underweight.

 

At 5.5 grams it would just be a little outside of tolerance so this is not a quarter struck on dime stock. A quarter on dime stock would weigh about 4.2 grams.

 

... double post, how do I delete this?

 

1970 dime should weigh 2.27 grams, yes?

 

Yes, but.
Conder didn't say it was struck on a dime planchet. He was referring to a quarter planchet on dime stock.

 

Breen gives the tolerances on the clad quarter as 5.67 +- .227grams which would make the minimum 5.443 grams , less than the 5.5 grams mentioned

 

Thanks for clearing that up. Stock of material fed into the planchet circle maker, not stock of planchets.

 

could be struck on a foreign planchet?

 

according to "strike it rich" book, a quarter struck on dime stock should weigh between 4.2 and 4.4 grams

 

As Desertgem pointed out, it's within mint tolerance. Nothing to see here. Move along.

 

To add some clarity to what you've stated, the quarter planchets were punch from stock that had a thickness intended for the CnClad Dimes. The metal was correct but the thickness was not.

These coins have a noticeable lack of detail near the edges of the coin due to a lack of metal flow to those outer areas.

Here's one:





Judging from the OP's photo's, I don't think that he has one of these coins.

 

Lighter usually means that the coin has been dipped in acid. It's probably worth face value.