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Rolled Thin Planchet Collectible?

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Pete2226's Avatar
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 Posted 07/20/2015  12:28 pm Show Profile   Bookmark this topic Add Pete2226 to your friends list Get a Link to this Message Number of Subscribers
One source I have identifies a rolled thin planchet as very rare. How thinly rolled must a planchet be in order to be collectible?

Here is a 1994-D JFK Half Dollar (on the right) rolled thin compared to a normal 1994-D JFK Half. The normal is 2.15 mm thick which is as specified. The Rolled Thin is 2.0 mm thick.

I know that the further off specification it is, the better. But how far off is considered to be enough to be collectible?



Rolled-Thin-Planchet-Collectible?
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biokemist6's Avatar
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 Posted 07/20/2015  12:39 pm  Show Profile   Bookmark this reply Add biokemist6 to your friends list Get a Link to this Reply
Thickness of a coin at the rim is a function of strike pressure, stronger strike equals a thicker rim(compare a proof vs. business strike). A planchet is not truly thin unless it is underweight.
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Halo1st's Avatar
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 Posted 07/20/2015  12:47 pm  Show Profile   Bookmark this reply Add Halo1st to your friends list Get a Link to this Reply
Weight and pics of both sides may help. Thanks, Doug.

edit: pics of obverse and reverse.
Edited by Halo1st
07/20/2015 12:50 pm
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Pete2226's Avatar
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 Posted 07/20/2015  1:04 pm  Show Profile   Bookmark this reply Add Pete2226 to your friends list Get a Link to this Reply

Quote:
A planchet is not truly thin unless it is underweight.


Thank you - that is what I needed to know. This coin is only underweight by 0.02 g - - and I do not call that underweight. I suppose that if it weighed 11.00 g or less (normal being 11.34 g) then that might be considered to be underweight. Still not sure where to draw the line on that, however.

Interesting that I found a PCGS graded 1956 Lincoln Cent rolled thin and weighing 3.11 g. Seems like this TPG does not quite follow this rule - so I am still a little confused about how to think about this variety. That coin can be seen here:
http://www.bgasc.com/product/1956-l.../error-coins

Error-Ref shows a Rolled Thin Quarter which is 0.75 g underweight. It can be seen here:
http://www.error-ref.com/rolled-thin-planchets/

Intuitively, it seems to me that being underweight ought to be a requirement for a definition of a rolled thin planchet - the more the better. It seems like how much underweight to be called a "rolled thin" may be a bit arbitrary.

Thanks for your help!
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Halo1st's Avatar
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 Posted 07/20/2015  1:22 pm  Show Profile   Bookmark this reply Add Halo1st to your friends list Get a Link to this Reply
Pete, I agree there is plenty of good info concerning cause and effect, but very little is recorded concerning rolled thin and split planchet stats. I to have searched in the past with little to none and or frustrating results.

I believe the first example 1956 LWC must have been a typo or someone missed something else.

Yours make the weight so low pressure maybe? Thanks, Doug.
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Pete2226's Avatar
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 Posted 07/20/2015  1:27 pm  Show Profile   Bookmark this reply Add Pete2226 to your friends list Get a Link to this Reply

Quote:
Yours make the weight so low pressure maybe?


Yes, I think so. Thanks.
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X2an's Avatar
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 Posted 07/20/2015  5:03 pm  Show Profile   Bookmark this reply Add X2an to your friends list Get a Link to this Reply
If you aren't too afraid about your coins - try ringing them to hear any distinctive tone differances. That's one way to tell them from another. I'm assuing it's average (lightly) circulated?
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Conder101's Avatar
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 Posted 07/21/2015  3:57 pm  Show Profile   Bookmark this reply Add Conder101 to your friends list Get a Link to this Reply

Quote:
I suppose that if it weighed 11.00 g or less (normal being 11.34 g) then that might be considered to be underweight.

Even that wouldn't be underweight Spec is 11.34 grams +/- .45 grams so a half dollar would have to weigh less than 10.89 grams to be considered underweight and out of spec.
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Pete2226's Avatar
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 Posted 07/21/2015  4:01 pm  Show Profile   Bookmark this reply Add Pete2226 to your friends list Get a Link to this Reply

Quote:
Spec is 11.34 grams +/- .45 grams


Right again! Thanks! That ought to teach me to check before spouting off!
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