Every example ken look at exhibited strike doubling on the mint-mark Except for the last one that one also if I remember correctly had strike...
I was correct https://koinpro.tripod.com/Articles/1969SDoubledDieCent.htm
If I remember correctly from Ken Potter's article the mint mark has strike doubling on the good ones
Keep in mind there is fakes out there check the mint mark closely if it's not double it's a fake Also I'm pretty sure Fred Weinberg has seen the...
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