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Pillar of the Community
United States
1781 Posts |
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Pillar of the Community
United States
5964 Posts |
Koinpro, MD, Die Deterioration, abrasion doubling- unlike doubled dies, all occur at the strike. Is it incorrect to classify them as Strike Doubling? I know the Die moves with the MD, It is worn with the deterioration, and overly polished with the abrasion doubling. The only one that wouldn't fit the Strike Doubling category would be the doubled die as it occurs on the die before the strike. Edited by CoinMasters
05/19/2015 9:47 pm
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Bedrock of the Community
United States
62064 Posts |
I usually use the term " Strike Doubling" for proof coins. They are struck more than once and sometimes more times. When I hear that term I think of flat field doubling and machine damage during the strike. But that is just me. |
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Pillar of the Community
United States
5964 Posts |
Yes I think there are two schools of thought on that. I think basically, (even though there are more causes) there is most of the time only Strike Doubling and doubled dies. Unless I'm shown to be way off base I think that will just be me. Thank you my friend. |
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Pillar of the Community
United States
1781 Posts |
My use of the term Strike Doubling refers to what many others call Machine Doubling (in its various forms). I used to call it Machine Doubling until I read the logic of JT Stanton in using Strike Doubling over Machine Doubling. This occurred when both were being used about equally, plus ANACS was using it (the only game in town at the time when it came to errors and varieties). JTs logic is published in the Cherrypicker's Guide for anybody to read and I still agree with it. So it's just a matter of preference. I just think Strike Doubling is a better term. In the 1980s I divided Strike Doubling into several different forms and published it in a handbook. I published it again in my Coin World column over a period of several months quite some time ago. One day, I'll post it all with the images I have on file or upgraded images. I classify Flat Field Doubling as from proof and specimen coins as simply FFD and when involving Business Strikes, as "Single Strike FFD". Additionally, I coined the term "Plating Split Doubling" which seems to have taken hold and introduced " Die Deterioration Doubling" to the hobby to replace "Polish Doubling" which my research at that time proved was an incorrect theory. I'll republish all of this at some point as it has all held up very well over time. I classify Flat Field Doubling as from proof and specimen coins as simply FFD and when involving Business Strikes, as "Single Strike FFD". Additionally, I coined the term "Plating Split Doubling" which seems to have taken hold and introduced " Die Deterioration Doubling" to the hobby to replace "Polish Doubling" which my research at that time proved was an incorrect theory. I'll republish all of this at some point as it has all held up very well over time. Edited by koinpro
05/20/2015 10:08 pm
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Pillar of the Community
United States
5964 Posts |
Right Koinpro, I have the Cherrypicker's Guide. I agree Strike Doubling is the better term. I think if the doubling actually occurs at the strike, it is Strike Doubling. At the same time, it is still very useful to know the various causes. It took you a long time to start posting on here after you registered. I'm glad you finally started, you are quite an asset to the forum. Because of you and a select few others, so many people on here have benefited greatly. Speaking for myself, if you think I'm ignorant now, you should have seen me only a few months ago. lol Thank you. |
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Pillar of the Community
United States
5964 Posts |
Quote:I classify Flat Field Doubling as from proof and specimen coins as simply FFD and when involving Business Strikes, as "Single Strike FFD". Additionally, I coined the term "Plating Split Doubling" which seems to have taken hold and introduced " Die Deterioration Doubling" to the hobby to replace "Polish Doubling" which my research at that time proved was an incorrect theory. I'll republish all of this at some point as it has all held up very well over time. I classify Flat Field Doubling as from proof and specimen coins as simply FFD and when involving Business Strikes, as "Single Strike FFD". Additionally, I coined the term "Plating Split Doubling" which seems to have taken hold and introduced " Die Deterioration Doubling" to the hobby to replace "Polish Doubling" which my research at that time proved was an incorrect theory. I'll republish all of this at some point as it has all held up very well over time. Talk about doubling. |
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Pillar of the Community
United States
1781 Posts |
CoinMasters,
What you say about sounin' ignorant?
Anyway, I've recovered (mostly) from the effects of cancer treatments seven years ago (and other health issues to follow) and find this an interesting place to be. Glad to help. I see Mike Diamond and Coop posting all the time too. Both very knowledgeable individuals. Others too but I know Mike well and Coop never sleeps.
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Pillar of the Community
United States
5964 Posts |
I thought it might have been something like that, I'm glad things are better than they once were for you. We all just hang in there as best we can. I enjoy every day God gives me here, and I look forward. It's getting late, so unlike Mike and Coop, I will get some sleep. Talk to you tomorrow.
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Pillar of the Community
United States
1781 Posts |
CoinMasters,
Life is different after cancer. You are right. Everyday is a gift! I take so much more pleasure in the small things that I often never thought twice about. I got a dog for the first time in my life and she goes with me everywhere I go. So much joy!
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Valued Member
 United States
64 Posts |
Thank God you are doing much better after you cancer treatment. I know how that is. And thank you all for the great lesion. I have learned so much!! Even if it a worthless coin I will keep it.
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Pillar of the Community
United States
1781 Posts |
LOL, Left, some of the worthless coins are the most valuable teaching tools! I still have my first example of Strike Doubling I found on the obverse of a Canadian 1967 cent. That goes back to 1980! |
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Pillar of the Community
United States
7390 Posts |
Ouch cancer is a beast, good to hear you came through it ken. Just wanted to say thanks for all you've been doing here. Now that I know your name your articles keep popping up when I'm researching coins. Most recently an article on the 2004-d Wisconsin extra leaves. Boy were you killin dreams for the guys who want to belive it was a nefarious design element. That must have been a wild ride for you when they were being discovered
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Pillar of the Community
United States
1781 Posts |
Cascade, Ya, I just have a different opinion of the cause of the "extra whatevers" but I think they are neat just the same. I still get folks coming at me about how much I just don't know about how this could have happened, mathematical probabilities stacked up against me, etc. Funny thing is that mathematical probabilities are stacked up on my side when you start taking about what is called "automation damage" in the stamping industry. Most scholarly mathematicians have never set foot in a stamping operation, much less been in one of 25 years so their take is skewed. Nonetheless, I've never claimed I know I'm correct. It has always been an opinion of cause that explains two similar shapes occurring in the same area on two different dies. I also have nothing against the variety as a collectible. I think they are neat!  |
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Pillar of the Community
United States
7390 Posts |
"Extra Whatevers"  ... I like it. I bet you've had some heated debates over it and probably still do. I found what looks like a leaf tip sprouting from the cheese but it looks more like a tone stain or something under mag. I'll post it when I get a chance |
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Replies: 21 / Views: 2,517 |
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First Page
Posted 05/19/2015 12:23 am
