| Author |
 Replies: 16 / Views: 3,370 |
Page 2 of 2
|
|
|
|
Pillar of the Community
 United States
7962 Posts |
I feel sorry for that coin  I agree it looks more like some corrosive process rather than delamination. Though the different percentages of each side affected are a bit puzzling (slightly over half on the flag side, but slightly under half on the side with the English legends, unless my eyes are playing tricks on me). Edited by tdziemia
11/19/2019 06:16 am
|
|
Pillar of the Community
Russian Federation
5177 Posts |
Quote:
Though the different percentages of each side affected are a bit puzzling Perhaps the coin was just held in the acid (or whatever) at an angle and not vertically. |
|
Pillar of the Community
Singapore
631 Posts |
|
|
Pillar of the Community
Australia
3831 Posts |
So far all posts that are described as "freak" or 'potential rare error' are all questionable.
This is no exception. At minimum - cleaned. I vote for acid damage. Ive tested on a few coins for hydrochloric acid dip for science class test and the result looks awfully similar.
There is no way planchet flaw have issues at both side with similar orientation.
My partial coin collection http://www.omnicoin.com/collection/gxseriesMy numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htmRegularly updated at least once a month. |
|
Valued Member
 231 Posts |
Let say if it has been acid how would you explain for the center lines because the center lines are so straight and why not put for the acid on the whole entire surfaces instead half of it to become unusual enough these are my questions and hopefully you can satisfy for me with your explanation there
|
|
Pillar of the Community
Australia
3831 Posts |
... No one sane enough would put their hands or fingers in hydrochloric acid.
Take it from edge of the coin, slowly dip in acid through halfway and pull out.
I highly recommend you eat a humble pie and do some serious study.
My partial coin collection http://www.omnicoin.com/collection/gxseriesMy numismatics articles and collection: http://www.gxseries.com/numis/numis_index.htmRegularly updated at least once a month. |
|
Pillar of the Community
United States
3184 Posts |
guys this person has posted on PCGS forums about rare coins from his country and whatnot with asking prices of hundreds of thousands of dollars. Just search and you'll see it. Seems like wishful thinking/trolling.
|
|
Valued Member
231 Posts |
The game is not over yet my friends normal surface size is thirty percent without straight line on obverse and normal surface size is fifty percent with straight line on reverse size the normal surface on obverse side is smaller than the surface on reverse side which is bigger for both normal surfaces and lines should be the same if dip half into the acid water after my research so your acid thought and opinion do not make sense anymore please open eyes big enough try to notice the normal surface and the line pattern on both sides of the coin and tell me for why their difference but not the same right for sure there
|
|
Moderator
 United States
34428 Posts |
@tc, you see that there at CCF is a pretty consistent opinion here that your coin was dipped in acid. As it is clear that you disagree with this conclusion, how about if you describe for us the minting process which could have caused this type of an error? Right now, I don't see how a coin can be minted like this.  "If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz
|
|
Valued Member
Romania
86 Posts |
Once again, I am trying to write without any commas and points. It's not working...
I am preparing for Christmas a really freak unique coin. Of course, mint error.
Will pour some drops of acid on it, then use some polish. Maybe hammer it a little. And some oxide, to change colour.
Then I will post it on this forum, as the most spectacular mint error, one of a kind, one in a billion coin.
Really, what is this forum turning into?
Edited by bogdanjovi
11/21/2019 3:09 pm
|
|
Pillar of the Community
United States
7962 Posts |
Quote:
normal surface size is thirty percent without straight line on obverse and normal surface size is fifty percent with straight line on reverse size ... (edit)... tell me for why their difference As correctly pointed out by @january1may, this is explained by holding the coin in acid at an angle. In fact, using trigonometry, we can determine that the angle was about 23 degrees. My measurements on your photos (made perpendicular to the acid line in the photographs) give 46% clean surface on the flag side, and 57% clean surface on the other side. Since the coin has a diameter of 32 mm, this means that the acid line is displaced by about 1.5 mm (11% times 32 mm) between obverse and reverse. So we have the situation shown in the diagram, which gives as a solution that the coin was held at about a 23 degree angle when you inserted in the acid:  Yes, the "game" is over. Edited by tdziemia
11/21/2019 7:41 pm
|
|
Valued Member
231 Posts |
These copper coin has curve line cut across surface on obverse side and it has straight line cut across on reverse side to prove it is not acid before because when you put half of coin dip into acid water and your coin likely receive straight line cut across on the surface on both sides of the coin but not receive curve line on one side of the coin surface as result please do not judge the book by its cover you should think properly and imagine yourself surely you get it so how are you going to explain for curve line cut across on the surface there
|
|
Pillar of the Community
Australia
3831 Posts |
I agree with tdziemia's description.
Thecollectible - by all means send it to NGC or PCGS. Any further discussion is futile and redundant.
|
|
Pillar of the Community
United States
7962 Posts |
Quote:
These copper coin has curve line cut across surface on obverse side This is a surface tension effect where the acid-coin contact line meets the edge of the coin. On one side, the coin supports the liquid, and on the other side gravity works against it. The game is over. However, you deserve credit for identifying that counterfeit flower coin on the other thread  . Thanks for sharing that. Quote:
Any further discussion is futile and redundant. Agreed. Now I'm done  Edited by tdziemia
11/22/2019 06:40 am
|
|
Valued Member
231 Posts |
These lovely coin has returned back to the dealer and exchanged to another interesting Chinese coin for sure Thank you much for your participation there
|
|
Page 2 of 2
|
Replies: 16 / Views: 3,370 |
Page 2 of 2
|
First Page
Posted 11/19/2019 06:15 am
