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 Replies: 17 / Views: 3,190 |
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Pillar of the Community
Canada
2519 Posts |
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Moderator
 Canada
10458 Posts |
1968 DDR - it is even in the PCGS registry set for nickel dollars. "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
 Canada
2519 Posts |
Isn't my coin PL, though? I thought the DDR listing is for business strike. |
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Moderator
Canada
10458 Posts |
If your coin came from the 5-coin pliofilm strips, then it is somewhere in-between... both ICCS and PCGS call those business strikes.
Your coin does not look like a mirror PL to me... could be just the lighting.
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
2519 Posts |
The 2x2 it came in says PL. This is the best I can do for the time being. Having ten bajillion LED bulbs on the ceiling and no desk lamp makes it a real pain to take pics here.  |
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Pillar of the Community
 Canada
5587 Posts |
So why is this DD .. it sure looks like MD to me. All offsets are in the same direction and minor shelving.
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Moderator
Canada
10458 Posts |
Look closer Bill... the top of the 6 is always the first place I look to confirm the double die reverse...
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Moderator
Canada
10458 Posts |
Also the DDR does also come in PL strikes... your second photos look much better - and looks like a PL to me... "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
683 Posts |
Split serifs means its a double die. Very nice, one of the few true Canadian modern double dies. (Well, that I know of).
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Pillar of the Community
Canada
2519 Posts |
Thanks! I'll make a note of that in the catalogue. Question about the nickel dollar varieties listing - why are flat field doubling and MD also listed? Not sure if I'm looking at the right thing on PCGS? https://www.PCGS.com/setregistry/ca...osition/3064 |
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Pillar of the Community
Canada
5587 Posts |
"Split serifs means its a double die" I've seen that statement for years regarding doubling, but I still think that it's not entirely correct. On the coin in question the 1, 9, 6 and maybe 8 are all offset in the same diction, but by different amounts. Machine or Mechanical Doubling is caused by a slightly loose collar/keeper that allows the working die, in the micro-instant after it makes a deep hard strike, to slightly move as the die is coming up. It is indicated by an offset shallow relief, or what most describe as a shelf. I don't see how a serif can't be split on an MD serif the same way that you can see it on all the rest of the digit or letter. It just depends on what direction the die slightly slips. If it's not 90 or 180 degrees, then a serif can be split. I'll go with what the book says, but I really don't believe it in my mechanical engineering head. |
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Moderator
Canada
10458 Posts |
This is a machine doubled 1968 nickel dollar on the date.  The shelf-like feature you speak of is like a shift on the existing die elements. It is impossible to split the serifs with that shelf or shift... Look at the top of the 6, and compare it to the original coin posted here. Bill, perhaps this might help: http://conecaonline.org/wp-content/...gFlyer-1.pdf Below, is another example of split serifs on a doubled die (1967 1-cent).  "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Moderator
Canada
10458 Posts |
"Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Pillar of the Community
Canada
2519 Posts |
Some additional pics.    SPP, were the new discoveries published in newer catalogues? If so I need to update from the 2013 one. |
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Pillar of the Community
Canada
5587 Posts |
Thanks for the reference, .. I have that and others. It's just that I don't believe the "split-serif" explanation for some MD's. Every digit in the OP's coin is shelved, but there is a split serif. Are you saying that the 6 was actually repunched and the rest is all MD?
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Moderator
Canada
10458 Posts |
Nothing was repunched... this happened during the hubbing or punching of the working die. The working die starts out as a cone-shaped face. The initial hydraulic press comes down on the die to a certain point, then presumably, someone noticed that the die blank was set into the punching press at a tilt (or the punch was at a tilt). So the press was backed off a bit and the die blank slightly readjusted to its proper position. While this was only a minimal shift, it was enough to create elements off-register. Sometimes, this happened two, three or four times. An official inside the Mint likely made the decision to try to salvage previously rejected die blanks with what they felt were minor problems. So, this something that affected the working dies, not the master punch or matrix. There are at least eight different versions of the 1968 DDR that exist, but the changes are pretty minuscule that the Canadian market does not really care... (so I never catalogued them). Of course, the Extra Waterlines are the most famous, but here are examples of a tripled die and even quadrupled die for the 1968 nickel dollar.   "Discovery follows discovery, each both raising and answering questions, each ending a long search, and each providing the new instruments for a new search." -- J. Robert OppenheimerContent of this post is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. See: http://creativecommons.org/licenses...0/deed.en_USMy eBay store
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Replies: 17 / Views: 3,190 |
Posted 10/01/2018 10:50 pm
