Working Hub Doubling. 1c WWHO-
RobertLahti
Posts: 328 ✭✭✭
You want to know what a realistic listed doubled die reflects Class 7 doubling. How it is clear between years what the difference of change is.
Liberty R has always had a slightly longer lead leg before the 1961 1c WWHO- (Wexler Doubled Dies)
But during this working hub doubling, and after through Lincoln Memorial cent years, the back leg becomes slightly longer.
We'll see...WHAT? What brought your attention...?
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I await the responses to this post.
Bump for luck!
Its my understanding that a "Hub" is the very first MASTER DIE!
The HUB is used at the Philly mint to create all sets of each of the other mints MASTER DIES!
Then each set of master dies is used at each mint to create what's called the "Working Dies" the working dies are the dies that are actually used to mint (strike) the coins.
So, the HUB die has minimum uses to protect its integrity, even the master dies gets limited use.
"I Prefer Dangerous Freedom Over Peaceful Slavery"
Thomas Jefferson!
A hub has a design in raised relief and is used to impress that design onto the dies. For every stage where you need to make a die, you also need a hub.
Class 7 huh?
You might want to double check that looks class 8 over here on my samsung.
Yep, the image engraved into the hub is called a "Positive Image"
but the working dies in the end has a negative image, which forms a positive image on the coin.
The positive image on the hub creates a negative image in the dies (or the working dies)
Now, lets not confuse the process of a 100 years ago with the more modern day.
I don't think a 100 years they created a HUB, or at lest if they did it wasn't called a Hub!
In the later years the die making has a three stage process,
Hub!
Master Dies (which I think some call these hubs too)
And working dies,
Coins are not struck using hub dies or what's being called Master Dies.
A mint may have several working dies going at the same time minting coins, something could happen to one working die to cause die strike issues with the coins its producing, while all the other working dies be fine.
The key point here is that the hub or master dies are very limited to use, its the dies that in the automated coin presses where the deterioration to the dies happens, and then, if the die needs replacing the process goes back to a master or hub die to create a new working die. From the video I was about the US coin minting process, its the Philly mint that creates the HUB, from there all the master dies or other mint HUB dies are made.
So, the Denver mint gets a set of master die from the Philly mint, these dies becomes the Denver mint's Hub dies.
Now, I will say that it gets confusing with the positive image, to negative image, to positive image on the coins
"I Prefer Dangerous Freedom Over Peaceful Slavery"
Thomas Jefferson!
This from the US Mint!
Hub, to hub dies, to working dies.
https://www.usmint.gov/learn/production-process/die-making
"I Prefer Dangerous Freedom Over Peaceful Slavery"
Thomas Jefferson!
You may want to check.
I believe hubs have been used for more than 100 years.
Also, I think “hub die” is a contradictory term. I believe it is either a hub or die, and no such hub die term or thing exists.
There are excellent videos and publications describing this process. All collectors should familiarize themselves with the entire mint process and tooling through these mediums. Many misconceptions exist due to the lack of knowledge regarding coin minting. Cheers, RickO