2005 D 1C Field above date to tie.

Has anyone seen anything like this before? Lamination?

 

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Try soaking in some hot distilled water to see if some of that is dried adhesive or debris. A stain may be the only thing left, but you will see lamination issues better after the soak…imo…Spark

 

Interesting. I would soak it to get a better idea of what's going on in that area.

 

I will soak, hot distilled water, then acetone for how long paddyman, Spark? It appears to be raised.

 

One mother of a plating blister?

 

Spark, add vinegar to water, blue dawn?

 

No to vinegar…it is an acid and unless you know exactly what you are doing it will turn copper pink. Same for acetone, some folks don’t use it on copper as it has a proclivity to add irridescence to copper surfaces.

Dawn is okay but no rubbing. It may reveal lamination after washing, but let’s see where a simple soak of distilled water gets us first…imo…Spark

 

OK

 

That's corroded. One heck of a bowtie if it isn't.

 

PMD? Too bad it wasn't coming from his mouth. It would look like he was smoking, yuck!

 

Corroded Lamination?

 

Can you angle the lighting and take a Picture or Two, perhaps? It's free to post here.
Need to get better pics. though to see better.
Try this: ( you can use a bottle or jar instead)