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<p>[QUOTE=&quot;John Burgess, post: 3810483, member: 105098&quot;]it can be linear plating blisters of course, or it could be roller lines (planchet striations) in the planchet, before the plating process, or a bit of both in all actuality. Linear plating blisters generally will give when depressed with a toothpick, roller lines won&#039;t depress at all. both look very similar on a zincoln in pictures because of the plating. and from a picture, you can&#039;t really tell which is which... not that it makes much difference because coins with roller lines aren&#039;t desirable, just like coins with linear plating blisters aren&#039;t desirable either.&nbsp; Both considered planchet manufacturing defects either way. These pictures aren&#039;t that good, the plastic of the 2x2 is throwing glare, and lighting is bad. but either way it turns out, it would be a lesser specimen due to these lines regardless of how they got there.&nbsp; at least some being roller lines is likely they are in the same directions from obverse to reverse which is pretty normal for roller lines since the same sheet roller is doing both sides at the same tim of the zinc to get it to the proper thickness.</p><p><br /></p><p>I know it&#039;s a zincoln, and they have lots of plating issues, but not every single blemish is a plating blister always. there are other causes in planchet manufacturing.[/QUOTE]</p><p><br /></p>

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