OK.. I know.. Posters always think MD are DD.. I have been getting much better.. RPM's.. Easy.. Just so many Varieties for some years that it makes it hard to track the right one.. But as for Doubling, I thought I understood how and WHEN in the process it occurs.. But I have a question.. I have found some the Look to me to be Machine Doubling.. But I dont understand how you can get MD on just SOME of the Letters.. while the Letter next to it will be fine.. Am I missing something? These look Flat like I would expect in MD.. And I expect Die Wear to be more.. ah well like wear.. Dull.. not Sharp like these..?? Thanks for any clues.. After searching and Reading and all of the help here at CT.. I am learning a BUNCH!! Thanks.. !!
I search for varieties all the time and have had a similar time with the MD/DD distinction as well. Check out the Cherrypicker's Guide. They have a nice section on how to clearly distinguish them with pictures. I has helped me tremendously. TC
I agree - get the cherry pickers guide. And if you search on this site for strike doubling or machine doubling you will find a bunch of posts.
Thanks.. But I guess I didn't ask my question clearly enough.. I have all the books.. I study.. heck I bet half the post about MD/DD are mine.. I ask a bunch of ?? .... I was just wondering how One Letter could be MD while another Right next to it is not.. What or How is that caused? Die wear?.. I thought that a loose die would cause more uniform doubling... Thanks again..
Well from the article in the cherry pickers guide on the deepest part of the die and with die grease and die wear I would assume that would vary at times. I am by far not an expert on this. I have a 1858 Flying eagle that just about every element front and reverse show signs of strike doubling - kind of cool.
More like a combination. The reverse reminds me of longacre doubling - secondary image around the outside of the wreath. The obverse looks like strike doubling to me - it is primarily the left side of the coin date with the shelf like image to the left. In the 4th edition of the cherry pickers guide on page 363 is the 1937 - the date 1858 looks just like that except the secondary image is to the left instead of the right. Sill cool in my mind.
The common thought is that there is movement of the die or die holder during the striking process. As you have noted. it is difficult to explain some of the MDD by die or die holder movement, and if it was produced by the striking, it shouldn't be considered as damage done after the strike process. You can find many articles that explain it as it is currently thought, but here is an article that looks at it differently by Alan Herbert http://www.pcgs.com/articles/article771.chtml Jim
