https://www.ebay.com/itm/115361064659?hash=item1adc0e26d3:g:udwAAOSwCp9iW5pe
I see one recently sold for a few bucks.
I agree that it looks like corrosion. Monkey pox or what @paddyman98: would say soaking in a puddle of urine.
https://www.error-ref.com/blisteredplating/
https://www.coppercoins.com/advsearch.php
Might look here. https://www.coppercoins.com/diesearch.php
http://www.error-ref.com/broken-punch/ The rpm for the 1979 D is south/southeast. Don't see it on your coin.
Happy Birthday! It happens to be my Birthday today also. I played a round of golf.
Just a 61 D with a die chip. [ATTACH]
The wife bought me 10 rolls this morning. This roll is one of them.[ATTACH]
Improperly annealed. Went through half box of BU rolls last night and found a few.[ATTACH] [ATTACH]
I don't think you need die markers on this one. The "I" in IGWT gives it away.
DDO-003 In my opinion. Good find!
A member here published this book. If your interested in errors. [ATTACH]
A doubled die is referred to as a variety not an error.
Maybe @JCro57; can give perspective. He was looking for the high mint mark a while ago.
I think PCGS waits to update to get people chasing the top pop.[ATTACH]
PCGS grade count so far. P. MS67- 219 MS68-5 D. MS67-142 MS68-20
NGC had a bunch graded 68 and 69. PCGS will update. They seem to be slow at it.
I believe the WAM's come from the Philadelphia Mint.
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