Gunk on Jefferson: what is this and what caused it?

39Special

Hi all, here's an absolutely PQ Jefferson that I really like, it is actually graded MS67 by PCGS, but on the upper right part of the triangle above Monticello, there is a really weird spot of translucent blue "gunk" that almost looks like a drop of wax! It's not carbon, I'm not sure what it is. Did the grader sneeze?

Seriously, anybody ever seen any spotting like this before, and if so, how can it be removed? Could I ask PCGS to remove this? Would they? There's nothing underneath the spot, you can see right through it, so it's definitely a surface spot and not part of the metal. Thanks for your help.

kryptonitecomics

I opened a roll from 1968 and most of the coins had something like this on them....kinda looked like grease/graphite mixed but I have no clue what it actaully is? I used a tooth pick to scrape some of it off but none of the coins were worth certifying so??

Type2

hear is a washington that had dont know what it is.

sinin1

It looks struck in design to me

so alloy mxing error, strike through, lamination error



if it was a drop of wax (as you describe it). I do not feel the design would be so distinct


since it is in a PCGS slab, it is hard to tell if raised from the surface or not I suspect

My idea would change if it is definitely raised from the surface

39Special

I'll loupe it again tonight to see if it might be a lamination issue. It's just really strange. Obviously didn't affect the grade any. Should a spot like this affect its value?