Uncleaned coins are likely to get you interested in fourth century Roman
bronzes. My uncleaneds mostly turned out to be in that time frame: House of
Constantine, Valens, Valentinian I, maybe some Gratian, Theodosius, etc. This ...
Joviel's Uncleaned Coins Study: Scott Uhrick
Scott has comparisons and statistics of numerous lots of uncleaned ancient coins he has purchased from various vendors. Definitely a good starting point for anyone delving into some good unclean fun! ...
cleaned coins Coin that have been dipped in acids or abrasively cleaned with an eraser or silver cleaners. cleaned paper money Banknotes that have been dipped and washed in cleaning fluids to remove dirt and stains.
What do you think about uncleaned coins lots?
I discourage beginners buying these coins. Most are rather poor condition and harder to read than better coins. This makes identification difficult even for experienced collectors.
Cleaned coins almost always loose significant value over mint state, uncleaned coins.
These are uncleaned coins that provide the students the thrill of discovery. I would wager that ACE will produce an archaeologist or two through their efforts.
The best way to tell the cleaned and whizzed coin, and to avoid them, is to know what an original coin looks like since there are less variations with the look of an original coin than there is with the look of variously cleaned coins.
Many coins advertised as ‘BU' actually are cleaned coins with light amounts of wear.
Many other ‘BU' coins that have no wear may have been dipped or cleaned to remove toning.
As a result, cleaned coins are worth significantly less money than wholly original coins. Even though a coin is dark in color, does not mean that it is less valuable.
The coins with the oxide were either completely or mostly free of the bacteria; not so with the cleaned coins, he said.
The findings show that the oxide itself, not the metals in the coins, inhibits bacteria growth, he said.
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Original, uncleaned coins have coloration ranging from green-gold to yellow-gold and luster that is usually frosty, but a few pieces exist that are semi-prooflike. Examples of this date can be found with good eye appeal.
Collectors prefer original, natural surfaces and will usually discount cleaned coins, sometimes heavily.
Elite Recommendations: Take your choice of MS-65 or Proof-65 and build a matched set with red surfaces. Pick undipped, uncleaned coins with excellent aesthetic appeal. Get set for a lot of hard work, for such coins are few and far between.
Many of these dealers in the big magazines (COINS, Coin World, Coinage, Coin Values, etc) are known for selling cleaned coins as BU/UNC coins. Before buying from a dealer in these magazines, simply Google their store name and do some research.
Now having bought a couple of cleaned coins from the expert in question and having lost more than 50% of their value when selling them I vigorously disagreed with the idea that cleaning wouldn't effect the value!.
Most are resources needed for Attributing, Valuing, Historical Information, Collector Communities, Auction Houses, Traders, Online Stores, News, Periodicals, Un-cleaned coins and tutorials on how to clean and attribute them.
with in some way after leaving the Mint, generally for the purpose of increasing its value to collectors. Typical altering can be the removal of a mintmark or installation of a spurious one. Altered is sometimes used in reference to cleaned coins.
My determination is that they pick and choose whose cleaned coins they will slab and certify. Also, collectors have maintained that ANACS and NGC favor coins with original (unaltered) services compared to PCGS.
Even without a microcope, these marks affect how light reflects off a coin, which is why many modern fakes "look wrong" even when the image looks right. Of course, this will not help one much on highly worn or overcleaned coins where the original ...
 See also: Coin, Collector, Grade, Dealer, Marks
  
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