New find, 1955 1 cent which looks like a D mintmark. The wave-like ridges have me guessing what type of error this could be. This coin it in Unc condition, I could not find one ding or bagmark on it. It seems to have natural toning. Any info will greatly appreciated.
I tried to recreate this. I did have a little success, but my wire wheel has fine bristles and I think a courcer bristle must have been used. It did create a similar effect. Thanks Fred.
Rick I have to agree with you on this one. Out of all the coins I have examined over the years. The ops coin reminds me of a coin that someone has chemically treated. Personally it reminds me of coins that are found at old tanning Factories. Rick did they have bristle wheels back in 1955. USMC60
It is caused from acid and I've seen lots of them at the coneca table, at the local shows ... I also live in Michigan too ...
Sorry Guys, this coin has NOT BEEN TOUCHED with acid. Fred is 100% correct. See Post#4. Key that it IS NOT acid are the outlines around the relief. ACID DOES NOT ADD RAISED OFFSET DESIGN IMAGES to coins. This effect has been called "Excessive or Extreme Whizzing" since the 1970's. When a coin is abraded with a high speed metal wheel EXCESSIVELY and way past the "minor" effect seen on a whizzed coin (tiny lip of raised metal on one side of the relief) it develops the characteristic wave effect we see on this coin. These can often be found in junk boxes or much harder to DIY. Don't hold the coin if you try to make one for your "Black Collection!"
The weight is 3.01 grams. As far as the edge, dont know if photos will help, but the edge measures .052 thousands of an inch at the 6 o'clock posision and .060 thousands at the 12 o'clock, .059 at the 9 o' and .057 at the 3 o'. I did not notice any metal roll-over on the edge near the date. That is part of what had me wondering what happened to it. Thanks for asking.
I am pretty sure that that is exactly what Fred said, over whzzed. this happened because the wheel used got the metal hot, there for raising it to the look of a wave. Any one who said a form of whizzing is correct, no need to think your are better than anyone else -around here.
If you have ever put a Wire wheel on a rotary device? Just to clarify, never used on a coin. But, can only imagine the effects.
Yes, but with the harder metal on guns and knives. All the lines were pretty much parallel unless I moved the item back and forth, and at that, they weren't on such a short wave pattern. But then again, copper is much softer so I don't know how it reacts, and will have to take your word for it.
Over the years, I have seen this effect on nearly fifty coins of all the common coinage metals except for tin, platinum, or gold. Nickel coins seem to be the most common. Silver dollars and halves next. Finally cents, especially Large cents. The lines on steel are parallel and fine because of the hardness, The buffing wheels I saw were brass, steel, canvas, and leather. As one poster wrote, heat is probably a big factor in the type of wave generated on the surface as they come in all sizes. Off subject but interesting - Since I cannot recall for sure the terms used to describe the height and distance between wave ridges (I'm too lazy to look it up), perhaps @SuperDave or @Paddy54 knows the technical terms and can enlighten us.
That's what I was getting at. I don't know how copper would react because I haven't brushed them. I just know how steel has reacted when I used wire wheels on some of my projects. Paint will move (at least car paint) if you do it right when buffing. I can't remember if that was just for Acrylic, Enamel, or both.
