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 Replies: 11 / Views: 1,485 |
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New Member
Greece
16 Posts |
Hello folks
I originally started my sets by ordering some bulk copper coins and filled my set up without the care for quality. I've since progressed to upgrading my years and getting a better set.
I have come across all kind of different penny coins and most look brown. Some Red. Some goldish etc. I really don't know how it works to he honest.
Can someone teach me what a cleaned out actually looks like? Some are very obvious and you can see black around writing then shine other areas
I dont know how a coin goes from beauty shine to dark brown. Is it the circulation or the air?
I recently purchased an album from deceased estate. I'll post some coins that I am unsure about. Let me know your thoughts.
Fyi I dont take the best photos. I took this under light Edited by DLM
05/14/2020 08:19 am
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New Member
 Greece
16 Posts |
First photo. I think cleaned   Edited by DLM
05/14/2020 08:28 am
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New Member
Greece
16 Posts |
Second photo I think this one is legit ?   |
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New Member
Greece
16 Posts |
Last photo. Forgot what year this one was. I am 50.50 with this one  They very much stand out from the brown. Why does a coin tuen dark brown anyway. |
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Pillar of the Community
Turkey
870 Posts |
DLM : Hi and welcome to the forum neighbor. I'm sure there'll be very experienced people here that can point you out to the right direction. My opinion from the pictures are:
1913 is obviously cleaned with something abrasive and probably recently. I can see some whiteish-milky residue on the small spaces between letters, which often indicates clearning with a chemical that polishes the metal. There are some other methods of cleaning, some are less damaging, but cleaning is vert caveat emptor, meaning one has to be extremely careful when he cleans a coin.
1933 seems to had a similar cleaning but perhaps it was sometime ago, or the coin left out to regain the colour a bit. It may also had a clean up with soap and warm water to remove residual chemical material after the cleaning, giving a clean feeling to the areas between letters. If I were to clean a coin, as a last resort (to try to remove PVC or verdigris damage) I'd use acetone or soap and water in the end to avoid the apperance of the 1913 coin in the end.
I hope this helps a bit.
Edited by molydeii
05/14/2020 08:28 am
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Pillar of the Community
Turkey
870 Posts |
Copper and bronze coins turn to dark brown after some time in circulation, contacting oxigen in the air and constant handling makes the process even faster. It's sometimes called a "patina" and it's a chemical reaction on the surface of the coin. On the other hand, plated coins, such as eurocents, to my observation, turn duller / brown very quickly after being exposed to oxigen in the air that we breathe.
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New Member
Greece
16 Posts |
Thanks moleydii
I dont know why someone wouldn clean a quality coin like that. I see 8 diamonds which from what I have read is EF+
Odd. In the album has plenty of non cleaned and dirty coins. Not sure why one would do it for one
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Pillar of the Community
Australia
1333 Posts |
remembering that most circulating coins were cleaned/whizzed to give them a shiny look, this was done up till the late 70s, I'm sure some of the older member might be able to correct me on the date.
first one bit overexposed not too sure
2nd definitely cleaned with hairlines
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Pillar of the Community
Turkey
870 Posts |
On the first one, dark areas around the letterings on the heads side, and the residue on the tails side, plus over-shiny apperance of the flat surfaces got me a bit alteretd. Maybe I am wrong. But yes, the coin really looks very sharp, would have made a nice EF coin otherwise.
I remember in early 1990s almost all dealers (at least in here) are advising to clean collectible coins periodically. I sometimes come across small lots of 1950's and 1960's Turkish coins here with a heavy amount of cleaning on them, and which hasn't been handled at least in the last 20 years. It's sad to see that.
Of course my opinion is very uneducated. I am used to handling British precemimal bronze, I do not have experience with Australian predecimals coins, other than owning a few.
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Valued Member
Canada
153 Posts |
Spend some time reading about copper oxidation. It should give you a better understanding of how these coins age.
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Valued Member
Australia
145 Posts |
Sorry for being so direct, but they are now just rubbish,,,
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Pillar of the Community
Australia
1610 Posts |
serenitystan - Ah, that is why in my short time collecting coins I am not overly fussed about condition. Yes, I'll swap better coins if I come across them but just the fact I have that coin makes me happy  . I guess I see coin collecting as a fun hobby and don't expect to make money from it. PS If you have any genuine 1930 pennies or holy dollars that have been polished just send that rubbish my way.  I'll gladly pay the postage and give you a slab of beer!  |
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Replies: 11 / Views: 1,485 |
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Posted 05/14/2020 08:11 am
