Is this a Sintered planchet??
Batman23
Posts: 4,999 ✭✭✭✭✭
I was looking at the recent thread of the video selling the 1959 burnt nickels in the ANACS slabs. All of the comments minimized the value of these black beauties and put them down at near face value. It seems that I have read recent threads about dark presidential dollars that carry a fair premium.
So, Is there any premium? Are there too many black 59 Jeffersons to carry a premium?
What is the proper name of the error? How can you tell if a dark coin is actually a mint error versus PMD?
I have a 79 SBA dollar that is very dark, this is one of the reasons I am asking.
So, Is there any premium? Are there too many black 59 Jeffersons to carry a premium?
What is the proper name of the error? How can you tell if a dark coin is actually a mint error versus PMD?
I have a 79 SBA dollar that is very dark, this is one of the reasons I am asking.
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Whether it's post-mint or not I don't know how to tell. I will say that if it has a full luster and no wear, it would be most likely be mintmade.
If it's post-mint, then it was most likely sitting in the ground for a time and you will be lucky LUCKY, I say, to get face value for it.
<< <i>If it's post-mint, then it was most likely sitting in the ground for a time and you will be lucky LUCKY, I say, to get face value for it. >>
The last time I checked the banks and stores still take these for face. Why would he be LUCKY to get face for them?????
<< <i>I was looking at the recent thread of the video selling the 1959 burnt nickels in the ANACS slabs. All of the comments minimized the value of these black beauties and put them down at near face value. It seems that I have read recent threads about dark presidential dollars that carry a fair premium.
So, Is there any premium? Are there too many black 59 Jeffersons to carry a premium? >>
The coins being sold on HSN do carry a premium over a regular 1959 nickel but not $250 worth. Besides, we just love to rag on those guys anyway!
Fred Weinberg does have a 1958, 1959, 1962 and even a 2006 for sale on his web site. As you can see from the links, the cheapest of the three is the 1959 since it is the more common coin.
From what I've read here and seen in person, dark presidential dollars are not being found by the 'roll' so would command a higher premium. This is of course inconjunction with the presidential dollar error craze which is currently occuring. Perhaps in 50 years, someone will find a bunch of these presidential dollars and their premium would then be lowered but for right now, since they are 'uncommon', folks do pay a premium for them.
<< <i>What is the proper name of the error? How can you tell if a dark coin is actually a mint error versus PMD? >>
The error is commonly referred to as a 'sintered' planchet or 'improperly annealed planchet'. Here is a thread which discusses this which has a pretty good explanation by errormaven (Mike Diamond).
This page gives the following definition:
Sintered
These planchets were kept too long in the annealing drum. While in the drum, they became coated with a layer of metal dust which the heat then sintered onto the planchet. These are known with partial, single-sided, and double-sided sintering. See also Copper Wash.
<< <i>I have a 79 SBA dollar that is very dark, this is one of the reasons I am asking. >>
An improperly annealed planchet that has coppered dust 'sintered' to its surface should show evidence of that dust on the surface. I am in no way an expert with regard to this condition but then I after reading some of the posts and theories regarding what causes this, there may not be any actual 'experts' only educated opinions.
Just from looking at your photo's, it is possible that the coin is truely sintered but you would have to have someone like Fred Weinberg or someone from CONECA examine the coin for a true attribution.
The name is LEE!
Does this SBA look to be a Sintered Planchet or post mint damage?
Follow-up question: What characteristics help you come to this determination?
You're SBA has altered surfaces/toning, in my opinion,
and isn't a Sintered Planchet.
As far as 'how to tell' - the easiest way is to look at
the coin, and see if it has "luster". Because the planchets
are sintered before they are struck, the striking pressure
on the sintered planchet still creates luster - it might be
less than a choice bu original coin of the same denomination,
but if the surfaces are flat, and they don't "rotate" (like the
cartwheel luster on many silver dollars), the odds are the
coin isn't a mint product.
Also, the edge of the coin might be darker than normal, but
if its the SAME DARKNESS as the obv./rev. surfaces of the coin,
that's another sign of alteration of the entire coin.
When the real sintered planchet coin is ejected from the collar,
the ejection action will 'strip' some of the darkness from the
edge of the coin when ejected.
After seeing enough examples of both types, it becomes easier
to tell a Mis-Annealed Planchet from one that is simply re-toned,
darkened somehow, or altered to appear like a sintered planchet.
Hope this helps at bit.....