Still confused! I need a tutorial.

2004 doubled die?

 

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Edit: you can't go wrong reading from error-ref.com
http://www.error-ref.com/machine-doubling/
http://www.error-ref.com/doubled-dies/
These photos might help as well:


Here is an example of a DDO or two that I own:


Here is Machine Doubling:

 

I’m sure this will help me out! Only working with 5x maginifyer. Receiving it Tom.

 

This looks more like md. I have seen many of pennies that have this.

 

I use this lens and love it.

 

I thought that, for errors, they recommend more like a 7x or 10x loupe...?

 

It is machine doubling... you missed the heading that said "Here is machine doubling". Seems like you're catching on, though

 

Didn’t see that, your right! I have a better magnifying glass hopefully it helps.

 

The best kind of doubling is still visible without magnification.