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Good pic of shelf doubling
lsica
Posts: 1,759 ✭✭✭✭
Really good example of plain old shelf/machine doubling from my own modest accumulation
1957 Roosevelt Dime NGC MS-66+
Pic by @messydesk
Philately will get you nowhere....
9
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Great example!
Although your picture shows Die Deterioration Doubling. The die wears towards the rim from the radial flow of the metal during the strike.
"Memento mori !"
I actually had to look that term up.
OK in the pics Im seeing online examples of die deterioration doubling look like "ghost images" and machine doubling seems to have more of the shelf-look in the images above. Is the difference just often not that clear?
" OK in the pics Im seeing online examples of die deterioration doubling look like "ghost images" and machine doubling seems to have more of the shelf-look in the images above. Is the difference just often not that clear?"
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I'm not sure what you mean.........
"Memento mori !"
Sorry..doesn't die deterioration doubling look more like a ghost image around the lettering? My image looks to me like its more "defined", like a shelf, which I thought indicated machine doubling?
This would be machine doubling:
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Die deterioration doubling follows from the die wearing, and that is why the doubling is mixed with die flow lines, especially at the tops of the letters.
Coin Photography
Sometimes it looks "Ghost like" - other times it is more advanced and looks like MD. Rule of thumb is, if it is "reaching" towards the rim it's die deterioration instead of a machine "bounce" creating Mechanical Doubling. It takes time to learn the subtle differences but really there is nothing wrong with the mistaking between the two - neither one is an error or has a premium - they are just part of the coin striking process.
"Memento mori !"