2017-D New Jersey Ellis Island Improper Annealing

Here's one I found a couple of weeks ago .

 

Log in or Sign up to hide this ad.

It's a genuine mis-annealed or
improper annealed planchet.

There's one easy way I could tell
it's genuine - can anyone guess
how?

 

copper bleeding through the clad layer ..

 

Close, but the copper core is there anyway;
it's not bleeding thru any clad layer.

 

The appearance of small cracks on the coins surface (obverse and reverse)?

 

No, getting colder.

I'll post the answer in about
5 minutes, if that's OK


Fred

 

It doesn’t bead water on it’s surface as it appears to be porous

 

It's a result of a loss of protective atmosphere or being stuck in the annealing furnace for a prolonged period of time, or both.

 

Yes Rick but how could he tell

 

Blackening on/or from the planchet and good images ..

 

I could immediately tell it was a
genuine mis-annealed planchet because:

Every single 'mis-annealed' coin that someone
has shown me at a coin show, or in an email, that
turns out to be environmentally damaged or played with,
has a darker duller surface than it should have, AND
every single non-error has the same dark color
on the reeded EDGE of the coin.

See the edge photo (#3) - it looks like a normal
BU Quarter - the copper core shows a nice normal
red color - that's because although the planchet
itself (on a genuine mis-annealed planchet)
would have the dark color on the smooth edge,
once it's struck in the collar, and ejected, that
dark color is removed from the reeding due to
the ejection of the now-coin from the collar.

(I could also tell it's real from the surfaces themselves, -
although mis-annealing leaves a range of 'darknesss',
seeing the reeding as a normal red copper color is one
of the keys to know it hasn't been played with)


Hope this helps - it's a good authentication point
to check, if you're not sure of a 'darker' color coin
is truly mis-annealed/improperly annealed, or has
been played with after the coin was in circulation.

 

It's uniform on both sides.

 

I am definitely smarter now for sure good info thanks!
Reed.

 

Yes it helps.. Thanks for the the formation!

 

Although most of the 'full' dark
planchets are uniform as to the
darker color on both sides, there
are some that show a normal
surface on parts of the coin, due to
how it was laying in the annealing
drum when it dried.

That's a good thing to look for, but
there are exceptions.

 

The reeding does look brand new ....

 

....as opposed to a coin that's
been 'played' with, which will
have the darker color ON the
reeded edge.

Closing the office now, will see
you all tomorrow morning.

 

Fred,

Could you please tell me your opinion on this coin I posted? The reeded edge looks like Rick's coin.
https://www.cointalk.com/threads/improperly-annealed-arkansas-quarter.289484/#post-2620461

 

Swan,

Based on the edge of the coin in your link above,
it looks genuine.

 

Thanks Fred.