Post your Lincolns!

Not in, but on the coin just like your spots but they were more black in 2009. I refer to them as water spots. Someday I'll pop one on the SEM-EDXFR instrument and determine the composition but for now, I think they are likely mineralized, insoluble salts of some sort. In my trials, they cannot be removed without damaging the surfaces.

 

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Nice one!

 

NICE! 67RD?

 

Yep! From there (actually 84) 67's are pretty much the norm.

 

But how does one determine the difference?

 

What are these freckles on a cent called?
I love the look of them; I thought they were PMD from heat when I first noticed one.

 

Mainly by luster, but the "look" tells a lot.

 

Gas bubbles, not PMD, they came from the mint like this.

 

Here are a few once belonging to GiJoe. The problem pretty much disappeared after 1990.

 

@BadThad and @robec - Thanks for the great info and pics regarding the gas bubbles. I had not heard of this before and really started to wonder after I realized I had seen numerous examples of these in circulation from around the same late 1980's dates.

The above pics are all of the same 1987 D Lincoln. Found this one in a roll from bank just in the last month or so.

 

Hmm I guess I figured those gas bubble coins were coins that had a condition problem, like corrosion, so I always toss them back. They're not pretty.

 

Got the camera out, not opening my AirTites though, so not optimal pics. Deep red patina with tons of luster:

 

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Frosty fields forever!