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<p>[QUOTE="usmc60, post: 2371028, member: 76739"]Sir I agree with a lot of aspects you're presenting but usually a machinist is not pressured when cutting a new die generally we call these a Monday or a Friday miscalculation, in a hurry to go home or plane just don't want to be to work on Monday in 16 years that I've been collecting I've only ran across a few of these most of the time the tolerance is held up to standards and by my measurements this particular die had a crown of 0.8 mm I personally may not have the experience of a lot of experts out there but I can conduct the same tests that they would and as you say the classification of this coin is in question error or not I'll have to go with if the visual appearance of a coin is noticeable and is not caused by PMD we'd have to assume this is some form of an error ? I just found my micrometer will be doing some more measurements and I'll have a weight on my next post and I have learned on this site there are experts out there who do watch this site. Unfortunately they do not weigh in on discussions like this if they did they would not be able to make any money, by having someone send the coin in to get their opinion. Years ago I had a friend that had a well-known error. He decided he was going to send this coin in to be graded and get a professional opinion he sent the same coin into three other graters at the time this coin came back with four different grades and opinions, and at this time to get a coin graded it cost you an arm and at least a big toe in cost. I personally do not expect any professional greater to give their opinion on this thread it would be bad for business. I am always willing to increase my knowledge if anyone has a better explanation for this bowl shaped go for it..[/QUOTE]</p><p><br /></p>
[QUOTE="usmc60, post: 2371028, member: 76739"]Sir I agree with a lot of aspects you're presenting but usually a machinist is not pressured when cutting a new die generally we call these a Monday or a Friday miscalculation, in a hurry to go home or plane just don't want to be to work on Monday in 16 years that I've been collecting I've only ran across a few of these most of the time the tolerance is held up to standards and by my measurements this particular die had a crown of 0.8 mm I personally may not have the experience of a lot of experts out there but I can conduct the same tests that they would and as you say the classification of this coin is in question error or not I'll have to go with if the visual appearance of a coin is noticeable and is not caused by PMD we'd have to assume this is some form of an error ? I just found my micrometer will be doing some more measurements and I'll have a weight on my next post and I have learned on this site there are experts out there who do watch this site. Unfortunately they do not weigh in on discussions like this if they did they would not be able to make any money, by having someone send the coin in to get their opinion. Years ago I had a friend that had a well-known error. He decided he was going to send this coin in to be graded and get a professional opinion he sent the same coin into three other graters at the time this coin came back with four different grades and opinions, and at this time to get a coin graded it cost you an arm and at least a big toe in cost. I personally do not expect any professional greater to give their opinion on this thread it would be bad for business. I am always willing to increase my knowledge if anyone has a better explanation for this bowl shaped go for it..[/QUOTE]
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What would you call a bowl impression ?
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