I am sure this is not an error, but I didn't know where else to put this. It is however odd, to me at least. I have found a dozen or so of these but only on 1996 D's. Anyone want to take a stab at it. After reading what Mike Diamond posted on the 1988 cent with die deterioration I thought that was it. These though are ringed in a doppler like fashion all the way around the coin. I am officialy stumped. Happy hunting, Michael
Does the coin show any of the normal flow striations, the radial flow lines associated with the flow of metal from the center out?
VERY interesting. I suspect what we are seeing are the "panagraph" reduction lines from the machine that reduces the image from the epoxy model down to the master hub. The cutter would leave a spiral groove or ridge from the center out to the edge. These grooves are normally polished off of the master hub and master die. If the weren't polished off I would think a working die created from it would make coins like that. Reduction lines can be seen on some seated liberty coinages and are freqently found on shield nickels behind the cross, through the leaves around the shield, through the bottom of the white stripes in the shield, and between the stars on the reverse.
That was my original thought, but i had never seen any or even heard of any existing. Having learned my lesson, what I thought was a 1969 DDO Lincoln, I now except that what I have is nothing until i prove it is. Do you have pics or links to other examples? Thanks, Michael
I am affraid that I don't know what to look for as far as flow striations or flow lines? What should I be looking for? Thanks, Michael
As Conder101 says, these are concentric lathe marks. A working hub was not polished (or was inadequately polished) after the cone-shaped face was machined. It was hubbed like this and the concentric lines were preserved. Concentric lathe marks are best known from the die pair that produced this 1996-D cent. However, I've seen a clear case in a 1999 or 2000 nickel. I'd have to dig it out to firm up the date. Concentric lathe marks are quite rare, but there's little demand for this sort of error.
I have several Kennedy 2001 P halves that have very similar lines around the coins. I was also curious to the origin of these lines. This particular coin came from a US mint bag and is in terrible shape. The bag of 2001 Kennedy's that I purchased had some great "D" coins, but almost all the "P" coins were of lesser quality.
So what kind of value can we assess for this coin? Do we call it an error or a variety? Starving minds want to know! I am assuming little demand brings little value. Michael
I know I picked one up for a few bucks years ago, but then again, it wasn't properly described. I would guess $25.
I have a '67 Kennedy that I removed from a special mint set, and mounted in a 2x2, that has heavy striations. A grading service at a coin show said that the coin was whizzed. How could that be?
I found one last night. mine is a 1966D. Here is a link describing it. http://www.errorvariety.com/Lathe-lines/
The first step should be measuring the lines carefully, because the lathe is gear driven with a specific size cutter and the width and interval of the lines will be Exact, hand made ones will vary. Look carefully at the "visually related link" such as http://www.errorvariety.com/Lathe-lines/06D-PMD.html as whizzing ( using a fine circular metal brush) also produces concentric lines to imitate the flowlines for luster, but are not precise.
This one is real. the lines are only in the field and go through (under) other features. This doesn't exactly match any of the ones on Jason Cuvier's website, so I emailed him the pics and asked if he would like me to submit it to him.
