2015 D hub doubling?

I read or heard 40,000 or so were minted and shipped with most all of them ending up in cigarette packs, three cents at a time, to make up for the problem of the cig machines taking quarters and the cigs were 22 cents a pack.

So each pack had three pennies in it.

Maybe I'm confusing this with another famous penny.

Just the same, several codgers have told me many dies have been made to stamp out CF's of the epic 55 for years and years. A recent batch possibly surfaced from southern TN near the AL state line. The word is they are a bit too pink to pass.

 

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Donwall57, The current method of die manufacture by the mint doesn't involve a double hubbing such as with the '55 and '72 lincoln, now they use a single squeeze process of die production, which can produce a secondary image on the working die due to a type of mechanical chatter. Some classify the secondary image as a "Doubled die".

 

What @desertgem is saying is that he believes this kind of doubling is more MD than it is a Doubled Die! I have still not understood this, but if the process is his dilemma, then I can partially agree.

 

Basically, that is true. With the classic hubbing process, it was human error to not align the dies properly for the succeeding hubbing, so mint error resulting in the doubling. With the single squeeze, any misalignment is mechanical, not human. If it was not mechanical, all of the same issue would be similar. Just personal perhaps, but that is the reason some issues have over 100 different 'doublings'. Makes authenticators happy I imagine. Everyone should collect what they wish, but there is a reason why a classic DD is priced differently than the modern process.

 

When exactly did the US mint start single squeezing pennies? Other coins?

 

There is a hazy period from about 1986 to 1996 where it seems experimentation and evaluation of various coins using this process took place. Many references state that from 1997 it has been only single squeeze (hubbing), but the mint is not always forthcoming with their experimentation/testinging/evaluating processes. Some may have more info. Jim

 

According to Wexlers site. Denver started making die with the single squeeze process in 1995. Philadelphia started the year after.

 

The 5 ounce "puck" dies aren't squeezed at all; they're CNC machined directly from digital files, no hub. They are "threatening" to do the same with other large coins, perhaps even the burnished finish ASE's.

 

I was wondering when that would happen and had no idea it was already under way. I wonder if they are done in a 4+ axis mill or lathe with live tooling. I suppose they could be done 3 axis easy enough although kellering requires lots of code and chews up lots of time.

Any idea of the machines used? I can't imagine why it would be guarded since CF'ing billet coins would be doable even 20 years ago. Today, much easier.

 

So instead of possibility of workers making one-offs, it will be 'acquiring ' and patching software to make a "DD" or other 'errors' for sale.

 

I would almost think they'd incorporate a feature or machining move that is proprietary, verifiable and replicable on highly specialized equipment. Maybe some diamond tipped micro-machined or laser etched hologram effect or something. No reason they couldn't own something like the world's smallest cutting mill that takes a 250,000 rpm spindle to make it work. My guess is depending on the numbers, there would be no shortage of variety and errors with machined billet coins.