I'm new here.

[Gregg]

Hi my name is Gregg, I've been coin roll hunting pennies for 3 years and find it relaxing and enjoyable. My focus is modern business strike BU. I continue to learn as I go. I think I am finding some errors and varieties. I have had some pennies graded for education and examples. I understand that the grading process can be subjective. I'm looking forward to hearing your thoughts, opinions and advice. I found an interesting 1972 yesterday that prompted me to join the Coneca group. It appears to be a DDO. I'm not sure if it machine doubling. The date is the only thing that I can see doubling on and it looks to be shelf doubling. I will add pictures when I can.

[MintErrors]

Welcome aboard.

The 1972 year was plagued by a lot of problems for US minted cents - even the master hub was doubled at one point, meaning that about 50% of those minted were considered normally minted coins, even with the doubled die on the master hub there were over a billion made That was just one of many issues.

A DDO on almost every 1972 shows the first three letters in LIBERTY slightly separated. Look at the bottom of LIB and see if you can see obvious doubling.

TRUST usually is a strong doubling area as well, the legs of the "'T's" typically can be 1.5 times wider than normal - it really depends on which one of the 9 or so DDO's for that year is being looked at.


A non-DDO usually has the "T" in LIBERTY look almost crossbow-ish, the cross bar of the "T" seems to be raised in the middle on most.


The article in my signature block may help. over time I will add more examples to the difference.

John Wexler web site also does a decent comparison between a doubled die and machine doubling....
https://doubleddie.com/144801.html

A self attribution website containing a lot of different US coins can be seen here:
https://VarietyVista.com

[ericoins]

Welcome gregg

[Gregg]

I tried to post some pictures of the 1972 Lincoln memorial earlier. How long does it normally take for pictures to get posted?

[MintErrors]

I tried to post some pictures of the 1972 Lincoln memorial earlier. How long does it normally take for pictures to get posted?

they should show immdediately after uploading. there is a max size per photo. I suggest no bigger than 800x800 pixels. I think each photo cannot be larger than 2mB each, with a 7 photo limit per post. You can add more photos later in the same message (thread) though.

[Gregg]

I tried to post 4 pictures taken by my phone. I will check the size. Thanks MintErrors.

[Gregg]

1972 DDo? After closer examination I think I see some minor doubling IN GOD. I hope the pictures help.

[MintErrors]

1972 DDo? After closer examination I think I see some minor doubling IN GOD. I hope the pictures help.

I cannot comment on the "IN GOD", because there is not a photo there. I enlarged your date photo, cropped it and here is what it shows me - mechanical doubling:

image_24522-date.jpg

All of the numbers shows a classic shelf or step like appearance.

It is at the base of the 1
The curl of the 9
The western side of the 7
and basically centered on the 2.

The link below IS a 1972 Doubled Die Obverse - it's vital to grasp the difference.
A circular "magnifying glass" should come up for you to see close up what the 1972 DDO Die #1 looks like:

https://www.pcgs.com/coinfacts/coin/...bverse-rd/2950

The "majority" of the 1972 DDO's would look something like this one:

http://varietyvista.com/01b%20LC%20D...972PDDO003.htm


This is why I suggested in my first post to match up the coin you have in hand to those reference sites I listed above.

Doubled dies are metal working dies that have multiple impressions in them that are off axis a little bit.
These dies are then added to a minting press and hammer out coins.

Remember - these dies are steel - the researchers show the area of doubling because it does not move - the area of doubling is impressed into the steel and may only show in select areas on that die.

When the die had those multiple impression done to them, the presses use nearly the same amount of pressure on each impression so the doubling should be at nearly the same height.

For your coin and the date again, it has a doubling look that is low and shelf like. If you put all of this back to the same height, it would appear as one good set of dates with no overlap. A LOT of people have difficulty understanding what machine doubling is. There are plenty of examples out there and compared to a doubled die, I would say there is at least 1,000 machine doubling coins to one doubled die. It's probably a lot higher ratio than that, I am being overly conservative, I think.

[Gregg]

Thank you for your time. I really appreciate your help with this coin.