Machine Doubling (MD)

[lineop3]

jcuve, I agree with kkady, and corroded! As a beginner myself, I finally understand it! Thanks for the ABC lesson. Now to tackle my bank rolls. LOL.

[rockdude]

Very nice, I love it. Thanks

[DWK]

Jason: You have outdid yourself. Fantastic. A really big help.

Gradually I am getting better. I believe it comes only with lots of practice along with really good examples to reference such as these.

I still have some trouble with certain recognized Doubled dies that are very subtle and look the same as MD to me. So I still often also mistake MD for legit doubling.

Thats when I need help such as you, Bob and others so graciously provide.

Thanks again, from all of us.

Dave Kearns

[jcuve]

Glad to see it has been useful!

[celartu]

Jason : This is a great contribution, thank you very much

[jcuve]

Machine Doubling:
SLIDE TYPE
Below are photos of Machine Doubling (MD) Slide Type
(coin courtesy Mike Diamond of CONECA)

[jcuve]

Strong example of Machine Doubling:

Another strong example: 1916
(a combination of Push Type AND Slide Type)

[jcuve]

Another strong 1992 with MD:



With an overlay:



MD on two examples of a 1957D (same die)

[copperlover]

It is clear that the amount of MD submitted, warrants some publication that could clarify this type of occurence. Jason I think it is time for you
to start a book showing the different types of doubling. Your work so far is awsome.

Lucien

[jcuve]

MD on the reverse of a 1863 Indian Head Cent:



MD on the obverse of a 2008 Washington Quarter: