Conder101

There are about 100 different Doubled Die Reverses known for this coin.  Probably close to one out of every three reverse dies for this design.

Oh look he has another impossibly blurred coin!
 
If this was CoinTalk I'm think we had RareTim here, the king of blurred rare variety coin images.

I think it has been cleaned/messed with.  If it was slabbed it would be as a Details coin.

They would still need to be stamped COPY.

The C numbers are Craig numbers originally assigned assigned by William Craig in his book Coins of the World 1750 - 1850.  When the Krause book Standard Catalog of World Coins came out the early coins were labeled with the C numbers.  Most of them were later renumbered with the KM numbers but some of the early asian coins still use the old C #'s..

I can see them and I suspect Machine doubling.

No, because SEGS is a good and legitimate service.  (Do NOT confuse them with SGS).  They may not grade to the standards of PCGS or NGC, but they are better at variety attribution than either of them

I can see them and I suspect Machine doubling.

The C numbers are Craig numbers originally assigned assigned by William Craig in his book Coins of the World 1750 - 1850.  When the Krause book Standard Catalog of World Coins came out the early coins were labeled with the C numbers.  Most of them were later renumbered with the KM numbers but some of the early asian coins still use the old C #'s..

I can see them and I suspect Machine doubling.

No, because SEGS is a good and legitimate service.  (Do NOT confuse them with SGS).  They may not grade to the standards of PCGS or NGC, but they are better at variety attribution than either of them

Pictures are not good quality but it COULD be a partially plated planchet.

No, because SEGS is a good and legitimate service.  (Do NOT confuse them with SGS).  They may not grade to the standards of PCGS or NGC, but they are better at variety attribution than either of them

Tungsten would weigh close to twice as much as silver.  Silver has a specific gravity of 10.5 grams per cubic centimeter,  Tungten is 19.3.  Tungsten is normally used to fake make gold, which has a specific gravity of 18.88.

Probably not a good sign considering NGC doesn't guarantee authenticity on ancients anyway.

Yes.
Standard Catalog of World Coins 37th edition.  The catalog only lists the weight for the silver version and it lists it as 28.28 grams.  Since the crowns are roughly the same size as an Ike dollar (they are a little larger)  I assumed the weight of the copper nickel would be a little more than the weight of a coppernickel Ike which should be around roughly 24 grams.  So based on the weight listed in the standard catalog they should be silver.
 
Interesting.  The silver version of the coins shown though would be a little less than the weight shown for the cat coin in the link that was provided because the cat is .999 fine and the Aircraft of WWI coins are sterling .925 fine.  I find their listed weight for the coppernickel unusually high.  For that number to be correct the coin woulld have to be very thick, about 25% thicker than an Ike dollar.
The tissue test should be a quick and easy way to determine if they are silver of not.  Just put a single layer of facial or toilet tissue over them.  It they are silver it will be obvious.  If you want put a coppernickel Ike, kennedy half, or even a quarter in with them to see if there is a difference in the color seen through the tissue.  

Yes.
Standard Catalog of World Coins 37th edition.  The catalog only lists the weight for the silver version and it lists it as 28.28 grams.  Since the crowns are roughly the same size as an Ike dollar (they are a little larger)  I assumed the weight of the copper nickel would be a little more than the weight of a coppernickel Ike which should be around roughly 24 grams.  So based on the weight listed in the standard catalog they should be silver.
 
Interesting.  The silver version of the coins shown though would be a little less than the weight shown for the cat coin in the link that was provided because the cat is .999 fine and the Aircraft of WWI coins are sterling .925 fine.  I find their listed weight for the coppernickel unusually high.  For that number to be correct the coin woulld have to be very thick, about 25% thicker than an Ike dollar.
The tissue test should be a quick and easy way to determine if they are silver of not.  Just put a single layer of facial or toilet tissue over them.  It they are silver it will be obvious.  If you want put a coppernickel Ike, kennedy half, or even a quarter in with them to see if there is a difference in the color seen through the tissue.  

Start with the Redbook, just about everything in there has been counterfeited.
 
Correct.
And that series does come in both coppernickel business strike quality and silver in Proof condition.  The weight does most likely match silver and not coppernickel.  A copper nickel coin the size of the silver ones would weigh nearly 4 grams less.  Looks like there are 19 pieces in the full set (38 if you get both compositions)  You appear to have KM512a top right, middle left and right KM510a, KM511a, bottom left KM519a, and KM515a bottom right.  The set numbers run 502 through 520 inclusively.

Copper plated zinc 1982 D small date, very slightly out of tolerance, nice color. No premium value.

It is worth a premium, exactly how much I couldn't say.  Errors are not my field of collecting.  Errors can be hard to price because every one is different.  I would think at least $25 though maybe more.

The next step would be a specific gravity test.  90% silver has a SG of 10.34, 40% silver SG is 9.53, and coppernickel clad is 8.92.  These figures are far enough apart that it should be fairly easy to determine which it is.  The tissue test does seem to indicate silver or silver plated but I don't think you could silver plate a proof and still have the mirrored fields.  So 40% or 90%, and if it was 90% with that low a weight the coin would be visually noticeably thin.  I'm still thinking a severely underweight 40% silver planchet.  (Assuming the scale is accurate.)

Difficult to say for sure but there may actually be something to this one.  But even if there is it is a minor DDO..

That's NOT die deterioration.  Looks more like a double strike, first strike in collar and second broadstruck.

Of course a simple look at the toning pattern on the ANACS piece shows it is NOT the same coin as the one he originally posted.

Of course a simple look at the toning pattern on the ANACS piece shows it is NOT the same coin as the one he originally posted.