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 Replies: 9 / Views: 2,090 |
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Pillar of the Community
Canada
1620 Posts |
The 'railroad' edge is plain to see, and goes all the way around the coin. I'm assuming that the coin was struck partially out of collar, and that is what caused the rim on the reverse to not be fully struck and be flat, yet fully struck on the obverse?    Edited by johnnysprawl
01/21/2017 10:58 pm
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Pillar of the Community
Canada
870 Posts |
Nice example! Very pronounced railroad rim.
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Rest in Peace
United States
17900 Posts |
Nice find indeed. Congratulations.
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Pillar of the Community
Canada
693 Posts |
It looks a bit suspect to me. The unstruck portion of the rim should be more rounded I think. Is the diameter larger than usual (it should be slightly larger). Also, if you look at the rim under high-power, do you see evidence of machining (lines going around the circumference), or indications of it being struck (fine perpendicular lines)?
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Pillar of the Community
 Canada
1620 Posts |
The unstruck portion of the reverse rim is flat but is slightly higher than the face of the coin.
The diameter is slightly larger (21.9 mm) relative to a normal 1975 nickel (21.3 mm).
No machining lines on the rim.
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Pillar of the Community
Canada
693 Posts |
Sounds good johnnysprawl.
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Pillar of the Community
Canada
581 Posts |
Hey JohnnySprawl, beautiful coin, love it very much! *** Edited by Staff - Please review the rules that you agreed to when you registered. *** |
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Pillar of the Community
United States
1699 Posts |
Yes. This error is called a partial collar error. This example would also be more colloquially referred to as a "railroad rim".
Without a collar to shape the edge of one side of the coin, this portion does not have to be perfectly round.
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Pillar of the Community
Canada
3234 Posts |
Great pics to help us get the best possible view of this rarity....and now better understand what took place..
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Pillar of the Community
Canada
1620 Posts |
Thanks everyone!
Apitrix, if I find another one you'll be the first to know :)
Edited by johnnysprawl
01/22/2017 10:38 am
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Replies: 9 / Views: 2,090 |
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Posted 01/21/2017 8:57 pm
