How can one tell if a coin has been cleaned or dipped?

jim

What are the signs or indications that a coin has been cleaned or dipped. It is in my opinion it can be difficult to tell if one has been cleaned. Does it change the luster or cartwheel affect? What can one look for in determing if a coin has been dipped and or cleaned? Can anyone post two coins side by side dispalying the difference? Your opinions are appreciated. Thanks, Jim

Veep

In general, if a coin has been properly dipped, you can not tell, nor can the experts. Sometimes a coin has been overly dipped (too long or too many times) and the luster is impaired. Other times, a coin that had dark toning or spots has been dipped and shadows of those problems remain after the dipping.

Over-dipping might lead to calling a coin cleaned. More often, cleaning refers to a coin that has been "wiped" with something which leaves behind telltale marks (hairlines) that are evidence of the tampering.

Stuart

Jim: Take a look at the following thread, and also do a text search on the word "dipped" through the CU forum search function for alot of background discussions on this subject.

Dipped Coin Thread:

jim

Thanks for the response. The info was helpful. Ethier way, sounds like I have my homework cut out for me.

Catch22

Yeah, there is no substitute for seeing many coins that have been cleaned or dipped. Next time you are at a show, look at a lot of cleaned coins. The more you see first hand, the easier it gets.

Dog97

If you look at a coin with your naked eye it's very hard to tell. But it's very easy to tell from a scan or photo because or discoloration that a scan or photo will pick up that your naked eye won't.

I could call this original but it aint cause I know better. I cracked it out of an NGC holder, dipped it and put it in a PCGS holder. The rev tone was too heavy and didn't come off. The grade didn't change, MS64.



This one was already overdipped & retoning when I cracked ot out of an ANACS 62 holder, dipped it again & put it in a PCGS 63 holder. It's really not brown in real life, just kinda of dull white.


Want a close up? YUCK!!!



I know this 98 was dipped, I didn't do it but I know who did. Notice the brown peripheral retoning. It's been darker & progressing over the years I owned it.



This used to be a bag toned DMPL Morg. You can see remanents of the textile pattern on the face.



I cracked & dipped this one in 1999 to get rid of the black spot but it was a slag mark & quickly came back. Still holdered @ the previous grade. Can't tell can you?

jim

Thanks for the pics dog97. You can really see the job on the 97 "yuck" agreed. However, on the other hand the 78 Morgan looked good, in fact too good.

XpipedreamR

A overdipped coin often has dull, flat luster looking like this...

Coinosaurus

Great pics one and all. Thanks for sharing.

airplanenut

Also, figure coins of a certain age that are white or light have been dipped--namely seated and bust... original coins from that era will be somewhat dark (which is how I like 'em )

Jeremy

keets

hey Jim

while it can sometimes be easy to tell an improperly dipped coin or a poorly selected and then dipped coin, it can also be difficult if not impossible to discern the opposite. the problem is a coin past the "point of no return" getting a helping hand. i think dog97 posted a few good examples of coins which should have been left alone.

al h.

Baley

Look at the date. If it's before 1900, and the coin is "blast white", chances are 99%+ that it's been dipped.

stman

I'll contribute to this to try and show what a cleaning and re-toned (secondary) coin looks like and what to look for. There are some hairlines but I've seen worse holdered by the big two services. You can see how the color and toning kind of float on the surface and don't really grab into the surface of the coin. Also you just don't see some nice original dirt in the denticles and devices. Just has a funky look to it and after you see a few with original toning.... you will know this coin I have posted is what you DON'T want to buy. Unless that's what you are looking for. I bought this as an example only, and think it's a good idea for anyone to own one and study it.