I think machine doubling

[ldarrellc]

what do the experts say? on the U in UNUM

[Dick]

I'm no expert, Darrel, but it looks like MD, to me.
Dick

[Bob P]

I agree. Mechanical doubling it is.

[ldarrellc]

whats interesting is that it is only on the "U" and no where else

[errorfinder]

i'am no expert ,, however, my 2cents; says that DDR is possible.i'am little short on time right now but i've a few 2004 -D's with only the U and first leg of N are affected ,They are DDR's .based on 200x magnification , veiwing the top N.E corners ,'spotting' notching (also where the seperation, can be seen) .took alot of angle 'coin' almost upright 90* degree and fiddlling with my light source. i use my 'toy' digital blue QX5 digital microscope and filtered light a whopping 18 Watts. the basis is based on there also, being upper bays or lower bays being DDR w/ ect sign..pillars or those little waves on top of the memorial. gotta go for now but "i'll be back" you all have a good N.

[Dick]

Errorfinder, I know what you are working with. I have the QX3, and I had a lot of trouble with the focus adjistment, and ended up mounting it in an adaptor, and used it on my QSZ 'scope. Makes for smoother adjusment. I'm not sure we have to go to that much magnification, to show what is there. I finally have decided 45X, is enough.
LATER
Let me qualify that. I have a problem with my eyes, and can't "pinpoint". So it is necessary to make a much bigger image.
Enjoy your "toy"!
Dick

[ldarrellc]

if i am correct in assuming this then all MD is a flat like surface? and all real double dies are round and form around the original design? the picture above is a flat like surface. so i do believe bob and dick are right about it being MD.

[Bob P]

errorfinder,
First off, I think you are getting way too carried away if you are looking at coins at 200 X magnification, and if you have to lift the coin that much. We have mentioned many times that you can pretty much see anything you want at that high a magnification.
We certainly don't doubt that there are coins out there where only a letter or two are affected. This does happen often and this happens with both doubled dies and machine doubling.
Ultimately, I will not tell people what to collect, nor how they wish to collect, but if it takes anywhere over 10 X magnification to see a variety, then it is best left in the change pile as it probably will not be attributed or collectible to others if you wish to sell it.

[Dick]

Darrel, you are right in assuming the MD is a "flat, as opposed to a rounded REPETITION of the original form. That is why the well known term "shelf doubling" is common. It is as it says flat, lateral displacement. Hope this makes it "prefectly clear".
Dick

[eagames]

Todays example of strike doubling
Notice how the 1 shows that shelf look:

[coop]

I received a coin similar to that year and found a marking that looked like a DDO. But on closer looking at the coin, I could see it was just part of the plating coming off of the planchet. It laft a line similar, but no flat step like looking.

On the above example, I have found some MD on just one letter. It was on the N of UNITED. Not the common machine doubling, but the letter had a line running even on the ends. But it was machine doubling. Again it was just on one letter. You should get too excited on doubling/apparent doubling on just one letter. Most of the doubled dies have several letters or entire OBV/REV doubled. The greatest example is the 1955P-1DO-001. So doubling should be seen on several letters to be a real doubled die. I know there will be examples of single letters doubled, but in the broader scope, they usually run this way.

[errorfinder]

yes i used 200x on my QX5 that was to verify that there was notching at the terminus of the letters. also showed seperation lines , verses just a shelf.no i normally don't go that far.. i go through most of the coins, just using a 10x loupe and set aside any i want to examine closer. then i'll use a 20x loupe . if there is still a question to what i'am seeing; i'll scope it out : on the digital microscope[QX5] . i like the real time display on my computer's monitor. as i don't have great eye-sight. here is one of the examples that i went through such a procsess with, and at first using a (10x loupe) it looked like MDD and still even at 20x the notching was 'inderterminate'. but with s0-s0 lighting and 60x through the scope . yep, it looked possible.(DDR) . after 'searching' the coin some more; with my 20x loupe, i found that the upper west post to be DDR, and again in the upper tenth bay... back to the scope,i found that the top 'waves' of the MEM. BLDG. where doubled from the 6th -> 8th to the east. i've just found a second example .better condition and stronger doubled die [includes ajoining devices seen on first one i found. and i will work up pics of it . for now here a pic . . 2004-D DDR...and also this link to more pics same coin .. http://mypeoplepc.com/members/mmaahhaamm/2004dddrlite/