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#23
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I'm not sure what the state of the art is for coins , but they seem to have tightened up a lot on things that were common, like nearly 100% of shiny silver coins being technically cleaned. With Stamps, the major expertizing groups have added grading, which is almost entirely based on centering. I've met a couple people who do expertizing, and the depth of knowledge is amazing. But they also tend to only work in a fairly narrow field, like US between 1873 and 1890. Not that they don;t know a LOT about all the other areas, and even about many foreign stamps, but their primary area they get paid to work with is just that. (Some may work more generally, most of the information applies across many areas) The first step for them is "is it a genuine stamp" followed by "which exact stamp is it?" any major flaws will allow a certificate saying it's real, but with noted flaws but no grade. They take their time, and apparently do compare notes between three different expertizers. Very little of that is done with scientific equipment, but there are groups working that way. They just don't do expertizing (although members might) They also take their time. I had a couple stamps looked at during a "what's my stamp worth" type event at the international show in 2006. The explaining how to tell what they were took him longer than the identifying, which took literally a few seconds. (I like done, had doubts about the other, and was pretty pleased to be right about both ![]() I've also sent in a couple, and the companies take their time so they get it right. One was probably easy, as it was one of the ones I took to the international, the other was a new discovery of a major variety, and the first of its kind expertized. Unlike PSA, they are totally ok with things that aren't cataloged yet in fact, getting a certificate may be necessary to get it cataloged. I included a copy of an article describing the variety, which probably helped. I haven't bought a new catalog in years, so I don't know if it ever got listed, or if I'd have to push a bit for a listing. (I had another discovery that was picked up on by a second tier catalog and listed. ) It's certainly possible to detect pretty much any alteration. But it does require knowing something about the item, and actually looking. Something the graders appear to actively avoid. |
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