Advice on telling DDO from machine doubling

[Guest]

Hi everyone,

Having looked around these past few weeks on both coppercoins.com and here on this site, I have to say that I'm more confused than ever concerning what constitutes a DDO compared with a machine doubling. I was told that it has something to do with the shelf but I've seen many examples of what appears to be machine doubling on only wheats that are being called DDOs. Can someone clarify or point me to a good resource.

Matt

[simonm]

Check out doubleddie.com for a great explanation on a true doubled die vs other forms of doubling. It might take a little bit of reading but when I first started, I read through the whole site and it helped incredibly. I would recommend reading the sections "how dies are made" so you know the procesa, "doubled dies" for the different types and their characteristics, and "worthless doubling" to help tell other forms of doubling apart from true doubled dies. Hope this helps!

[jcuve]

My tutorial here is helpful:

http://www.lincolncentresource.net/forums/showthread.php?t=6528

[onecent1909]

this is what I told someone else...seemed to help...think of play-doh... when we were kids we had molds..they made cars and thing with the play-doh... push the mold down...get the item... now move the mold over a slight bit..press down again.. and part of your design gets. smushed... this is what machine doubling would look like... a smushed flat area of a design on a coin..the letters will be smashed by the amount the die "bounced"...the flat area plus the raised area would equal a normal letter... a ddo or a ddr would have design or letters that were bigger or twisted.. letters ending in a point would show 2 points...

[Justafarmer]

For beginners I suggest they limit their search to coins graded XF or better. Concentrate on RPMs due to the fact you can focus your attention to a single feature of a coin's design.

[seal006]

A HUGE point to consider as well is that coins look different in hand than they do from a photo. Do not get discouraged. Use it as a challenge. Challenge yourself to LEARN the difference. This will not happen overnight. Many members on this forum have dedicated over half of their lives to learning and teaching others. We are a select group. Welcome to the club.

[jcuve]

This is the perennial lesson for any variety or error collector just starting out. Read any and all tutorials. Then one has to properly identify machine doubling on a coin. Acquiring at least one cheap RPM and one cheap doubled die to compare to. After that it is just searching, observing, questioning and hopefully a synthesis of the information will occur.

We have some expanded explanations here at error-ref.com as well: http://error-ref.com/Machine_Doubling_.html