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RPM or Machine Doubling...............................
DIMEMAN
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This is a pic of the MM and surrounding area of a 1963-D Dime. It is probably MD. My question is that if this is MD why is nothing else doubled or offset. When the die bounces or planchet turns wouldn't everything be doubled? How can JUST the MM get the doubling? So is this a RPM or MD?
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my vote is rpm
Minor Variety Trade dollar's with chop marks set:
More Than It's Chopped Up To Be
I do not think that is Machine Doubling
I believe that is MD
MD is a funny bird that sometimes only affects some design elements and not others.
Here is a great example.
that is the bazillion dollar question and ive never heard a decent answer. not that many and myself have tried.
with all other legitimate doubling with various pivot point(s) and tilt, it all seems to make sense. there is some doubling that is still just plain odd.
inconsistent md is and will continue to be a mystery to me; especially in situations like your mm dime and ive seen many coins/denoms like that with various elements.
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Looks like MD to me.
As for why it is only on some design elements, that's usually the case. I don't think I've ever seen a coin where there was equivalent doubling on all design elements. Sometimes multiple elements, sometimes just a date or a motto. My guess, we need @FredWeinberg or maybe @errorsoncoins, but my guess is that it is because of the structure of the die and the condition of various design elements. I imagine when the planchet skips a little bit, some of the more firmly held elements stay relative stable. Or, maybe it's more that the MD expresses itself as a slight displacement of the entire design element rather than a little shelf.
I could be totally off base on my guess. @Insider2 will be along to call me a moron if I am. But if you look at the vertical line on the main "D" and the second "D", they are identical in shape and displacement. An RPM would not be such a perfect shadow.
Most of the RPM Roosies have a unique looking repunched MM, as this is identical to the main MM, so I vote MD.
Later, Paul.
Looks like me to me as well jmo
MD too me. of course. But how are the other attributes not affected. Are they printing shells, and then ....never mind. MD !
I don't know much on the subject but surely looks neat
Not a RPM.
Well, pituitary! I knew I should have checked my CPG as soon as I posted my thoughts.
Oh well, live and learn.
Interesting example.... and the seemingly exact variations in the D edge lends credence to machine doubling... but sure is clearly defined...Cheers, RickO
During the exact moment a coin is struck there are a lot of parts in motion.
The force of the strike causes extreme actions, reactions, heat, metal displacement etc.
Now add 2 separate dies, one in motion as well as the planchet itself and you have a lot of
possibilities of chatter.
Not a surprise why MD is so common.