I know it's not an error, well, maybe an error in judgement but definitely not a mint error. So the story of this coin begins 6 months ago when a mechanic was changing the filters in the H2S scrubber and got a little curious. After seeing what 6 months of being exposed to a corrosive gas does to the metal parts of the filter he decided to see what would happen to a quarter. The cladding on the reverse is 99.99% gone, just some silver discoloration remaining. The obverse somewhat survived. There's heavy pitting and uneven surface corrosion. I was told the coin came out with a thick blue residue coating it which he cleaned off. Anyway I just thought it was interesting and wanted to share what coins exposed to corrosive environments could look like.
Interesting to see it, and know exactly how it was damaged. A very good example of one of the limitless ways in which a coin can be damaged.
I used to have an Ohaus triple beam balance, back in the day. I don't think i was using her for coins though .
Well it's the lab balance from work. It wouldn't be my first choice but unfortunately at the moment it's my only choice. It does the job until I get something of my own, lol.
Heisenberg as in the atomic bomb? I'm just a lab officer for environmental consultation and management company. We just use the balance for volatile and tss.
