| Author |
 Replies: 15 / Views: 2,888 |
|
|
Pillar of the Community
United States
2224 Posts |
Can't tell what happened to this. If it is PMD I'd like to know how it was done. Is it a major Greaser or a die adjustment strike? Or neither? Any opinions appreciated; thanks.   |
|
|
|
Pillar of the Community
United States
4132 Posts |
It could be some kind of weak strike or hard planchet, but it could have been done on a grinding wheel or something too. It's not underweight, is it?
|
|
Pillar of the Community
United States
1699 Posts |
 Looks like a genuine error. Either a weak strike or hard planchet |
|
Pillar of the Community
 United States
2224 Posts |
Just checked the weight; 5.0 grams on the nose. Proper weight.
|
|
Pillar of the Community
United States
3592 Posts |
Whne the rims are worn it usually means PMD..a weak strike would still have full rims as would a Greaser. |
|
Pillar of the Community
United States
2738 Posts |
This is a weak (low-pressure) strike. The two proximate causes are inadequate ram pressure or insufficient die approximation (excessive minimum die distance). All evidence indicates that the vast majority of weak strikes in the marketplace are due to spontaneous equipment malfunction. As a result, the terms "die adjustment strike", "die trial", and "set-up piece" are invalid.
Error coin writer and researcher.
|
|
Pillar of the Community
United States
3592 Posts |
Always good to be corrected by the best. Mike, if you return, could you tell me where I'm wrong about the rims ? Obviously I've been mislead somewhere along the line.
|
|
Pillar of the Community
United States
4897 Posts |
with Maineman that is what I believed too, in regard to the rim... Help us learn....what say ye Mr. Diamond? |
|
Pillar of the Community
United States
2738 Posts |
A weak strike will show poor development (or no development) of the design rim. That's the case in this coin. The coin will preserve the beveled surface that connects the apex of the planchet's proto-rim to the edge of the planchet. I do believe that this is also present, although it's hard to tell from the photo. Nickel planchets often don't show much of a bevel, so this is not a critical or entirely reliable diagnostic.
You'll also notice that the peripheral letters hug the internal margin of the persistent proto-rim. That's typical of a weak strike. The coin does not expand to full diameter.
Error coin writer and researcher.
|
|
Pillar of the Community
United States
4897 Posts |
Thats why you are my second favorite Mike Diamond in the world!  Cheers! |
|
Pillar of the Community
United States
2738 Posts |
The first, I presume, is the Beastie Boy by that name.
Error coin writer and researcher.
|
|
Pillar of the Community
United States
4897 Posts |
|
|
Pillar of the Community
United States
3592 Posts |
Great stuff and thanks for the lesson Mike..after hearing your explanation it is much more obvious on the coin. And now I'm off to add your words to my library.  |
|
Pillar of the Community
United States
2224 Posts |
Mike, I will add some pics of the rim this evening to help you in your determination. Thanks for the input!
|
|
Pillar of the Community
United States
2224 Posts |
|
|
Pillar of the Community
United States
2738 Posts |
Not a bevel here, but a step. It still doesn't undermine my diagnosis, however. As I said, nickel planchets show little or no development of a bevel. It's much more noticeable on other denominations.
Error coin writer and researcher.
|
| |
Replies: 15 / Views: 2,888 |
|
Posted 04/11/2012 8:09 pm
