I just wanted to let you know about a new video that we published this week that shows new footage of the 1964 Morgan dollar hubs on store at the United States Mint. Last month, I provided Leroy Van Allen a sneak peak of the hubs and asked him for his opinion about the hubs. A link to his remarks are embedded in the video - they can also be read directly by going to CoinWeek.
Some of the engravers knew about it. I know that John Mercanti says that he was aware of them. The Mint has a number of objects in its vaults related to artwork. These became known to numismatists after the Mint provided Bowers, Tucker, et al... access to them during a tour. The Mint is currently evaluating and cataloging its historical assets.
Not master dies, master hubs. In the early stories about them when they were first revealed to the numismatic public they kept calling them master dies, but they are hubs.
Was curious about the difference between hubs and dies so found this nice explanation on wikipedia "First, an artist creates a large plaster model of the coin. The plaster model is then coated with rubber. The rubber mold is then used to make an epoxy galvano. All of this takes place on a scale of around eight inches. Next, a Janvier reducing lathe takes several days to reduce the image onto a steel master hub. The master hub is then heat treated to make it hard. The master hub is then used to make only a few master dies via hubbing, which involves pressing the master hub into a steel blank to impress the image into the die. The master die is then used to form as many working hubs as needed through the same process, and then the working hubs are put through the same process to form the working dies. These working dies are the actual dies which will strike coins. The process of transferring the hub to the die can be repeated as many times as necessary in order to form the number of dies needed to make the amount of coins required. The difference between a hub and a die is that the hub has a raised image and a die has an incuse image, so one forms the other"
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Posted 12/07/2016 6:00 pm
