My title it is the question, I present here the two type of the new era coins of the single squezee which start in 1999. What it is your oppinion on this? Class 9 manifests during a single hubbing and can be located centrally or almost throughout the design. There are two types of doubling: Jolted (Type 1): mimics offset doubling, and is focused in a hot zone of the central design elements. Parts of a device are replicated in the adjacent open fields. They can be marginal, offset, or even show rotation. There is a maximum spread, and a limit to how much is duplicated. Typically, there is one region on a coin’s design where almost all doubling occurs. This can be surmised by similar doubling found on coins from Denver and Philadelphia. (e.g., 2009 Lincoln cents) This type of doubling is created earlier in the hubbing, when the die can still jolt back into correct position leaving only a trace of doubling. It should be noted that doubling could be caused, at least on occasion, by the press being reset during a hubbing – there is no clear indication as to how often that occurs. Decisive examples include: 2015P 25c NE DDR-004; 2009 1c FY DDR-002; and 2009D 25c DC DDR-001 Roly-poly (Type 2): The second type is characterized by an offset distorted extra thickness that is roly-poly in appearance. Doubling can manifest over a larger section of the die, including the periphery. Doubling is typically stronger centrally and weakens toward the edge of the design. The doubling is related to type 1, with horizontal play between the hub and die, but the point of contact seems unceasing, and instead of a jolt, it rolls under pressure extruding the design as the tilt stabilizes. On some examples, there is a wobble, accounting for notched corners and separation lines. This type of doubling can be secluded to a small area or can be widespread. The doubling is unlike class 4 with milder separation lines, soft corner notching and a roly-poly extra thickness. It is unlike class 6, in that the distortion is offset, and does not distort toward the edge. Key examples include: 2006 1c DDO-003; 2015 1c DDO-001; 2012P $1 BH DDO-001 Silvio
Interesting topic. I have heard a member here on CoinTalk mention that single squeeze process eliminates any kind of doubling completely. So in essence there should not be any type of Doubled Die varieties.
If we look from the point of view working Hub and Working Die. But before???? Yes This it is also my point. Seem could occur anomalies and we associate with DD's. From my point are from Master Die or eventually from the Master Hub. I want to collect all informations from collectors and put in one sintese analyze. I know Mike will be happy to wrote about and also our host to have this dismistified.
Here's my opinion https://www.lincolncentforum.com/forum/showthread.php?45697-Double-Die-single-squeeze-hub
The problem with your link for me it is the missunderstunding in time how the Dies are produce. Is talk about the tilted. Is no tild in this procedure of the Die Born. It is no strike, the Dies are done appling progresive forces and due to this process the majority of the DD's are find in the midle of the design. Your tought?
There has to be a force that moves and shifts the metal during the term squeeze as stated. I also don't think that there is a double strike to the working die. The mechanics of the press could be that the press overloads and releases the pressure. To not overstress either die face. And then starts again to finish the squeeze, this would definitely leave a second image on wherever the die faces touched the first time.
The thing to keep in mind is that in the past, doubling occurred on multiple impressions. Class 9 doubling occurs on a single squeeze because of the conical die and the shift during the squeeze. Doubling by a different method but doubling just the same.
I agree with this statment. Yes during the srtikes you can have more pressure or less and made the inprints of design thicker or less, But Doubled die I do not see. the Mint implant this procedurres to eliminate the DD's and I do not think theirs studies was wrong.
There's more then class 8 and class 9 doubled dies coming out of single squeeze hub . Lunch time at the US mint everybody stop what they're doing we'll just restart everything after lunch that's how you get other classes of doubled die folks . It's also in the link I posted coming from a variety expert that's been to the US mint Carry on
Me too. That's all these "doubled dies" are. They're analogous to strike doubling on a coin, except they repeat, because they're on the dies, themselves. The hubs slipped, and the dies, themselves, are strike doubled for it. Nothing spectacular to search for and collect, here, but a shaky hubbing manifested on the dies. The diagnostics are different in these, these aren't true doubled dies, they're rather "strike doubled dies" with those all too familiar slip and slide diagnostics.
