YADQ (Yet Another Doubling Question)

I'm having trouble telling the difference between machine doubling or die deterioration doubling. Is this MD or DDD? Is there an easy way to tell them apart, for reference?

Thanks for any opinions

 

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Have a good read of this
https://doubleddie.com/144801.html

 

It really doesn't matter whether it's machine doubling or die deterioration doubling, both are NAV (no added value) doubling. the key is telling the difference between a doubled die, and any other type of doubling. if you got that down, what type of NAV doubling doesn't really matter.

 

Ah, ok. doubleddie says "The photo above shows die deterioration doubling on the letters of TRUST on a 1960 Jefferson nickel that was clearly kept in use for too long a period of time. Notice how the doubling on the T actually shows on both sides of the letter."

So, because we're seeing doubling on both sides of the N here:



We can assume that this is Die Deterioration Doubling?

 

Granted, but I'm seeing authoritative answers of whether it's MD or DDD in here and I'd like to be able to determine that as well. Just for educational aspects. Also in case I start buying doubling I'd like to have a firm picture of what kinds there are. (and more importantly, as you said, distinguishing it from real doubled die doubling)

 

A good enough example, yes.

 

Thank you sir

 

...and both MD and DDD can be on one coin as well...jmho...Spark

 

The reason why people can be distinctive between the two (MD and DDD) is other visible markers on the coin. MD occurs when the die is not quite secure and "bounces" in whichever direction when striking the planchet, giving that known look of "flat and shelf like" in one direction.
DDD is when the upper edges and the walls of the incused part of the die (the devices) start to crumble with overuse. Often accompanied by radial flow lines in the field. MD and DDD can be observed together on some strikes

 

I suppose this quarter is not a good example with all the wear and damage it has had, but I'm not seeing radial flow lines in the field on it. Would that be a step in excluding DDD?

 

You can see the starting of radial flow lines around ISLAND on your example. They are there from the beginning but only noticeable as the luster of the coin. A great example is the "cartwheel luster" when you tilt the coin and light hits it. They get deeper and wider as more strikes means more metal moving across the flat of the die (the field) from the rim to the centre as this is where more metal has to move to fill the largest recessed areas of the die to create the devices

 

Oh, this!


Duh, it was staring me right in the face. Thanks, I see it clearly now.

 

Here's a very Great Link : Layout 1 (conecaonline.org)

 

Nice. Thanks!