All right (maybe shooting my foot off), but over the last week or so I have been researching the process of minting coins (not the dies, just coins). From what I could find is that ALL proof sets or any coins with S mint mark plus any ASE, use a vertical press (just incase someone does under stand, anvil side down and hammer die above). I also discovered that when the hammer die does it's squeeze to make the coin; The hammer die lifts ever so slightly and squeezes again. After which a mechanism ejects the coin. This mechanism is contoured on one end, and opened on front. The mint employee then stacks the coins onto a rack, close to how you would find them if they were rolled for circulation type coins. I will be coming back to this a little later with a question.
Now for coins minted for circulation. Apposed to what I thought because of the way it was explained. Coins minted for circulation are actually minted on a horizontal plan (tack your desk and run a pin back and forth and this is the horizontal plan). I'm not sure I can really explain this next step with out really doing a hatchet job on it, but I'm sure if I do Danial or Paul will correct it. Ok..The planchets are directed through a series of tunnel like devices to move them into the correct position. Now after getting the planchet into a position of basically on its rim, the hammer die move back and forth at a speed that you really can't say. With knowing this, it gives me a lot more knowledge on how some errors can accrue.
Now for the question I have from the first part of all this. Seeing as he hammer die is actually set to do this second small squeeze and if it was off from the first. Would you consider the machine doubling?
Thanks
DScoins
Coin Minting
Moderator: Daniel
Forum rules
Here's a link to how to post a topic with images in our community https://coinauctionshelp.com/welcome-to ... community/
___________________________________________________________________________________________________________
You also agree to follow these guidelines. You must agree to these rules to be a member of this forum. NO SPAM! Spam is deleted within minutes, no spam will ever be left in our community.
1. Post a front and back image of your coin with a specific question about what you’re seeing or asking about and one coin per topic.
2. Please remove coin from the holder unless it’s US or an official mint case or unless it is graded by a grading service.
3. Images should be taken by a camera or cell phone camera, we ask that members don’t use images through a microscope screen.
4. Always start your own topic, please don’t ask about your coin or post your coin in someone else’s coin topic.
5. Do not send private messages about your coin unless an Admin ask you too and the same for sending emails through the board.
6. No spam. Do not post any links to your coin or other non-coin websites.
7. Always be respectful even if something makes you upset or you don’t agree with a member. You can always get a second opinion elsewhere. If you have an issue then politely ask an admin in an PM. PM’s are for issues, technical and personal, but not for coin questions (refer to number 5 on this list). Our community is not a soap box for complaining or drama, so please refrain from doing so here.[/size]
Here's a link to how to post a topic with images in our community https://coinauctionshelp.com/welcome-to ... community/
___________________________________________________________________________________________________________
You also agree to follow these guidelines. You must agree to these rules to be a member of this forum. NO SPAM! Spam is deleted within minutes, no spam will ever be left in our community.
1. Post a front and back image of your coin with a specific question about what you’re seeing or asking about and one coin per topic.
2. Please remove coin from the holder unless it’s US or an official mint case or unless it is graded by a grading service.
3. Images should be taken by a camera or cell phone camera, we ask that members don’t use images through a microscope screen.
4. Always start your own topic, please don’t ask about your coin or post your coin in someone else’s coin topic.
5. Do not send private messages about your coin unless an Admin ask you too and the same for sending emails through the board.
6. No spam. Do not post any links to your coin or other non-coin websites.
7. Always be respectful even if something makes you upset or you don’t agree with a member. You can always get a second opinion elsewhere. If you have an issue then politely ask an admin in an PM. PM’s are for issues, technical and personal, but not for coin questions (refer to number 5 on this list). Our community is not a soap box for complaining or drama, so please refrain from doing so here.[/size]
- DSCoins
- Coin Guru
- Posts: 3459
- Joined: Thu May 16, 2019 7:47 pm
- Location: South central PA.
- Has thanked: 159 times
- Been thanked: 932 times
Coin Minting
USN Retired Jun1977-Jun 1997/100% disabled VET. (Not a wounded warrior)
Member CONACA
ANA
PCGS
NGC
Finds to date
2000-P .05C Strong Clashed Die O/R PCGS # 14129072 photo at maddieclashes
1983-P DDR FS-01-1983-501
5 2000 WAM FS- 901
Member CONACA
ANA
PCGS
NGC
Finds to date
2000-P .05C Strong Clashed Die O/R PCGS # 14129072 photo at maddieclashes
1983-P DDR FS-01-1983-501
5 2000 WAM FS- 901
- Paul
- Master Die Variety Examiner
- Posts: 19097
- Joined: Wed May 29, 2013 9:19 pm
- Location: Wisconsin
- Has thanked: 906 times
- Been thanked: 3323 times
Re: Coin Minting
Keep in mind, that "Proof" coinage is struck multiple times. That's what gives it its 'proof-e-ness', so to speak.
Knowing this, when you encounter a "Ultra Deep Cameo", it has been struck multiple times. Now, if you look at this coin under a high definition, high magnification microscope, you will be able to see the slight 'shift' that occurs between strikes, that appear as steps on the edges of the devices. Yes, this would be called mechanical or strike doubling.
Knowing this, when you encounter a "Ultra Deep Cameo", it has been struck multiple times. Now, if you look at this coin under a high definition, high magnification microscope, you will be able to see the slight 'shift' that occurs between strikes, that appear as steps on the edges of the devices. Yes, this would be called mechanical or strike doubling.
- mhonzell
- Administrator
- Posts: 2734
- Joined: Mon Jul 22, 2013 2:14 pm
- Location: Arizona
- Has thanked: 172 times
- Been thanked: 461 times
Re: Coin Minting
If the coin rotated significantly between strikes (unlikely) then you would have a double strike. Still not doubling.
-
- Similar Topics
- Replies
- Views
- Last post
-
- 3 Replies
- 975 Views
-
Last post by Daniel
-
- 22 Replies
- 7825 Views
-
Last post by Daniel
-
- 4 Replies
- 4707 Views
-
Last post by LWH36
-
- 15 Replies
- 3436 Views
-
Last post by Daniel
-
- 1 Replies
- 1021 Views
-
Last post by Daniel
-
- 3 Replies
- 1112 Views
-
Last post by gooddie
-
- 11 Replies
- 1119 Views
-
Last post by Earle42
-
- 1 Replies
- 2633 Views
-
Last post by Paul
-
- 10 Replies
- 5190 Views
-
Last post by Daniel
-
- 2 Replies
- 1764 Views
-
Last post by Paul