Quote:
After reading both sources, they both say something different. One source says a true 1969-S coin will not have a double mint mark.
The other source says that is a myth.
They actually both say the same thing, they just use different language.
The true 1969-S
DDO will not have any die doubling on the mintmark because the mintmark was applied by hand after the die was made.
Some don't like to refer to anything but true die doubling as "doubling", preferring to use other terms to describe
Machine Doubling so as to avoid confusion. When PCGS says no doubling on the mint mark they mean no die doubling.
When Ken Potter says the "no doubling on the S" is a myth, he's including
Mechanical Doubling in the definition of "doubling", as you can see by image 6 in his article.