Anyone recognize this planchet size?

CoinSearch55 · October 22, 2020 10:27AM

I came across this dime in a collection of dimes that had been set aside for quite awhile until I had time to research. Now that I am retired, figured it was about time. It is a 1983 D Roosevelt Dime on an offsized planchet. The diameter is 16.72mm with a well formed very symetrical rim and no reeding. The weight is only 2.0 gr. The color is off as well, medium grey and has no luster, but is very sharp in its detail.
I have been looking for potential foreign planchets and have not found an exact match; some close, but not matching both.
Any thoughts are welcome.

TurtleCat · October 22, 2020 10:34AM

From what I've seen published, the mint was not making any coins for foreign countries in 1983 or even 1982. The last reference I found was for 1980 for the Dominican Republic. It would be at Philly and would be 2.5 grams and 17.9mm. So I do not believe it was a foreign planchet. Pictures would help a lot. It could have been post mint altered as well.

lkeigwin · October 22, 2020 10:34AM

My thought is we need to see good images.

I suspect the dime has been played with. The rims may have been filed. The coin may have been acid washed. Any number of possibilities exists. As you might hope, maybe it was struck on the wrong planchet.

Posting pix is easy if you've got them.
Lance.

FredWeinberg · October 22, 2020 10:41AM

Photos needed -

Very doubtful it's on a foreign planchet.

More likely a coin with some type of
damage .

With no reeding, it would weigh less.

Can't be sure of anything without seeing pics.

ms70 · October 22, 2020 10:46AM

In my completely non-expert opinion, it does appear to be struck on a planchet smaller than it was intended for.

FredWeinberg · October 22, 2020 11:10AM

It's damaged - PMD

It is not on any other type of planchet -
it's a damaged dime from being in a
dryer, in all probability.

That's why it weighs about 10% less.

Did not leave the US Mint looking like that.....

Tom147 · October 22, 2020 11:30AM

PMD Post Mint Damage

Oldhoopster · October 22, 2020 12:06PM

@CoinSearch55 said:
Thank you Fred. Sorry for what may be a silly question on your response, I do not recognize the acronym PMD. Can it really loose 20% in a dryer? Are we talking a home clothes dryer? I have put lots of coins through the wash before (much to my wife's delight! Our agreement is she gets to keep anything she finds in the wash) and they have never shrunk because of it.

A coin can get stuck between the rotating drum and stationary outer support drum of a dryercausing it to tumble in the narrow gap. The constant tumbling can cause the edges/reeding to wear and become thicker. It doesn't necessarily have to be a dryer, any place a coin can get stuck and tumble could cause the same effect. Dryer coin is just a catch all term for this type of post mint damage (PMD)

http://www.error-ref.com/?s=dryer+coin

Regardless, it could not have left the mint like that. During striking, the planchet is constrained by a collar. The metal flows out towards the collar and up into the rims and reeding. Your coin is smaller and the rim is crowded into the letters and fields. That can't happen during striking because the dies and collars have standardized sizes. Even a smaller planchet would flow out towards the collar before it completely filled the rims.

Not sure why the weight loss. Is your scale calibrated and do other dimes weigh within tolerance? A clad dimes weighs 2.268 gms +/- 0.097 and you are using a scale that only has a resolution to 0.1 gms, so it's not unreasonable to believe that the low weight could be due to circulation and/or the PMD if the scale is accurate

CaptHenway · October 22, 2020 2:31PM

BTW, silver dimes weighed 2.50 grams when new. Clad dimes weigh 2.268 grams when new, so it is not 20% light.

And yes, it is PMD.

CoinSearch55 · October 22, 2020 10:41AM

Thanks for the quick response. Here's a picture.

CoinSearch55 · October 22, 2020 10:50AM

Normal weight is 2.5 gr and this one is only 2.0. Pretty significant difference (20% less). Then there's the 6.5% difference in size. Here's the back photo.

CoinSearch55 · October 22, 2020 11:25AM

Thank you Fred. Sorry for what may be a silly question on your response, I do not recognize the acronym PMD. Can it really loose 20% in a dryer? Are we talking a home clothes dryer? I have put lots of coins through the wash before (much to my wife's delight! Our agreement is she gets to keep anything she finds in the wash) and they have never shrunk because of it.

CoinSearch55 · October 22, 2020 3:23PM

Thank you all so much for the valuable information. I was not aware of that mechanism on wearing down the rim. I was having a lot of difficulty understanding how the rim that is there exists with the coin detail inside the rim. It still seems a bit of a miracle that the rim is so uniform.
One last question, since this is Post Mint Damage, is there any value to this coin? any points for uniqueness?

JBK · October 22, 2020 3:23PM

Look at the design. It was properly struck up before it was damaged. The rims push/fold against the design. It was worn down in dimension after it left the mint.

TurtleCat · October 22, 2020 3:25PM

@CoinSearch55 said:
One last question, since this is Post Mint Damage, is there any value to this coin? any points for uniqueness?

Unfortunately not. But please stick around the forums. It’s a great place to learn and share.

ms70 · October 22, 2020 6:37PM

I just think the degree that the "3" in 1983 is buried in the rim is to an unusual degree.

ricko · October 23, 2020 5:52AM

Keep the coin as an example of the 'problem'...PMD comes in many forms and this type is more common than most people think...Cheers, RickO

Anyone recognize this planchet size?

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