A Closer View Of Machine Doubling And Varieties. In 3-D

Definitely a good and very worthy thread! It's a very important one.

Not sure what a SEM is?

Love it when you do post like this. Distinguishing the difference between a double die and machine damage is one of the most challenging aspects of searching for me.

Of interest, maybe, is that these machine doubled coins are not unique. It is not a one-time and done thing, but something that occurs the same or similarly on several to many coins. Apparently, or at least from what I have observed.

My example will be the very strong 1957-D that is used above. This die has become quite valuable to some collectors and it is by far the MD coin with the highest premium I know of.

1957-D Lincoln Wheat cent with machine doubled date (4 different examples)

Beautiful cent tropicalbats! What do you think about this quad MD. All of this happened in one stroke. This came off a 1983 P LMC. I haven't seen anything close to this one.

When I first started in November of 2017, every time I saw md I thought I struck gold! Ive learned a lot in a year. The only reason this one is in a 2x2 is because of it being a quad MD. I haven't seen anything like it since.

Hey Jim! That's a spiffy quad you've got. Only seen that once or twice ever, and not nearly as strong as yours. Very nice keeper there. And yes, there actually are quad doubled dies known, although not many. One of them is on an Accent Hair 1964 Proof Lincoln half which makes it a double cherrypicker variety. PCGS puts QDR on the label instead of DDR like ANACS does.

1964 Kennedy half dollar accent hair quadruple die DDR-003

Here is a 1890 Indian Head cent that is a Quad die:

But most of the time when there is a tripled or quad die, they are harder to see than doubled dies. But the best ones are the ones you can see the spread/spreads/spreadings.