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 Replies: 19 / Views: 682 |
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Valued Member
United States
256 Posts |
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Bedrock of the Community
United States
73798 Posts |
Yep, those are roller lines. Pretty cool.  Errers and Varietys.
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Valued Member
 United States
256 Posts |
I've never seen that on proofs...is that normal?
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Moderator
 United States
95018 Posts |
What does the reverse look like?
I don't think they are roller lines it just shows up on the frosting area. Which is the highest part of the coin.
All 3 of the coins show the 'lines' in the same direction with the same orientation in regards to each other.
Roller lines are created when the roll of metal is flattened to the proper thickness before blanking takes place. then the blanks go to the upsetting mill then on to the oven and other processing before they enter the striking chamber - chances are that all 3 will fall in the chamber and line up all exactly the same, THEN all 3 end up in the same set is beyond atomically impossible.
I think this happened during the process of packaging.
Edited by Dearborn
05/01/2024 2:14 pm
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Moderator
United States
95018 Posts |
another possibility I just thought of is when the frosting was applied to the dies the lasers were not adjusted properly. In that case they would all show up in the same direction...
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Pillar of the Community
United States
3535 Posts |
Never seen that on a proof coin before, very strange.  Lasers out of adjustment , certainly could be. |
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Moderator
United States
187807 Posts |
I do not believe those are roller lines. They are from the lasers used to etch the die for the frosting.
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Valued Member
United States
256 Posts |
Here's a couple more shots...   |
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Valued Member
United States
256 Posts |
Would this be considered a error?
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Moderator
United States
95018 Posts |
That isa good question, it 'could' be considered an error, albeit a minor one. it certainly is interesting looking - But seeing how it is in a lot of your coin it may be more common than we think.
I'll have to go back and check my set now...
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Moderator
United States
187807 Posts |
Quote:
Would this be considered a error? I do not believe so. It is a normal part of the process now. |
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Pillar of the Community
 United States
6467 Posts |
Just the other day, I posted a 1987-S proof nickel with what I believed to be roller lines. As Dearborn said, it is basically impossible for the planchets to have lined up on all your quarters.
I can't tell from your pictures, are you shooting images through the plastic case? It might be that the optical properties of the plastic are creating the appearance of lines.
Edit: if you zoom in really far, you can see distortion on the blue background that is running in the same direction as the lines on the quarters.
Edited by Brandmeister
05/02/2024 10:54 am
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Valued Member
United States
256 Posts |
Quote:
I can't tell from your pictures, are you shooting images through the plastic case? Not shooting through the plastic. I opened these up. Quote:
I'll have to go back and check my set now.. You can not see these when you look at the coin straight on. It's when you have light on the side of the coin and they just light up. I'll post a couple of pics to maybe better understand. Thank you for all the shared knowledge. This forum rules.      |
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Pillar of the Community
United States
6467 Posts |
I propose an experiment. Keep the light position the same, the camera position the same, and rotate the case 90 degrees.
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Valued Member
United States
256 Posts |
Quote:
I propose an experiment We love experiments.... Quote:
Keep the light position the same, the camera position the same, and rotate the case 90 degrees.   |
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Valued Member
United States
256 Posts |
Ohhhh....is that 90° or 45°?
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Replies: 19 / Views: 682 |
Posted 05/01/2024 2:05 pm
