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odd error coin

this is one odd error coin it's a 1978 Indonesia 100 Rupiah , the error has been ID correctly as a It's a die crack with a cud.(thanks guys for the help)
in hand

close up of error

one of the odd error coins I have in my collection
in hand

close up of error

one of the odd error coins I have in my collection
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See http://www.doubledimes.com for a free online reference for US twenty-cent pieces
https://www.omnicoin.com/collection/colind?page=1&sort=sort&sale=1&country=0
<< <i>partly filled die is what the coin shop and some others have said it is >>
It's a die crack with a cud.
Grease filled dies obliterate details (sinking into the coin/lowering the details) cracks show up on coins as raised metal where the coin expanded up into the crack during striking.
"You Suck Award" - February, 2015
Discoverer of 1919 Mercury Dime DDO - FS-101
https://www.omnicoin.com/collection/colind?page=1&sort=sort&sale=1&country=0