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<p>[QUOTE="lehmansterms, post: 3916581, member: 80804"]It appears - though it's not possible to be 100% sure from a photo - that this could well have a serious active case of bronze disease working beneath the encrustation.</p><p>It's quite possible you would wind up with a more-or-less featureless disc - or just debris in the bottom of the tank - if you were to do electrolysis.</p><p>One plus for electrolysis, however, is that it's pretty good for removing superficial active BD - if BD has established itself in the core of the coin, there's little chance you will ever be able to salvage "a coin" out of this lump at all.</p><p>Some of them are simply too far gone - you just can't reasonably ID them. Deep forensic study might shed some light on its origin, but I know folks who save those "hopeless" pieces and for a goof scatter or bury them shallowly in public places or elsewhere their presence might confound some future archeologist. Not too sure about the overall propriety of that, but it is something you could do other than flipping it directly into the bin.</p><p>I do applaud you for trying - many impatient or profit-centered folks give up on much better preserved pieces than this. Working with barely identifiable coins is a great way to build your identification "chops", although it can be very slow and frustrating going until you clear the first steep learning curve. Don't let this discourage you too much. </p><p>As for "cleaning", go ahead and try if you're so inclined. You're not going to be able to cause any real "damage" to a valuable piece here. By definition, it's unlikely to be rare, and it's already probably 99% dead.[/QUOTE]</p><p><br /></p>
[QUOTE="lehmansterms, post: 3916581, member: 80804"]It appears - though it's not possible to be 100% sure from a photo - that this could well have a serious active case of bronze disease working beneath the encrustation. It's quite possible you would wind up with a more-or-less featureless disc - or just debris in the bottom of the tank - if you were to do electrolysis. One plus for electrolysis, however, is that it's pretty good for removing superficial active BD - if BD has established itself in the core of the coin, there's little chance you will ever be able to salvage "a coin" out of this lump at all. Some of them are simply too far gone - you just can't reasonably ID them. Deep forensic study might shed some light on its origin, but I know folks who save those "hopeless" pieces and for a goof scatter or bury them shallowly in public places or elsewhere their presence might confound some future archeologist. Not too sure about the overall propriety of that, but it is something you could do other than flipping it directly into the bin. I do applaud you for trying - many impatient or profit-centered folks give up on much better preserved pieces than this. Working with barely identifiable coins is a great way to build your identification "chops", although it can be very slow and frustrating going until you clear the first steep learning curve. Don't let this discourage you too much. As for "cleaning", go ahead and try if you're so inclined. You're not going to be able to cause any real "damage" to a valuable piece here. By definition, it's unlikely to be rare, and it's already probably 99% dead.[/QUOTE]
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