My $1 is pure White.
Mine are Whalen Counterfeits.
They were made in 2002 and sold into the hobby.

It was a big deal. One long time club member was thrown out of the Club.

"I don't know if values or rarity change."
Yes they do.

Is there any sort of a correlation between a the Letter value and number of chips believed to be in existence?
Yes.

Many, Many, values and rarity's have changed since 2012.