1964-D Kennedy Quadrupled Die Obverse & Qdo FS-105 - What's The Difference?

In fact it is not a difference as I know. From one reason or other (PCGS internal decision) they do not wrote FS-105.

You can't take the grid prices on those variety coins as meaningful. You have to navigate to the page and look at the auction results. Even those prices are so thin that you're better off researching the auction prices on Great Collections and other sites.

The parent-child structure appears to be historical. At some point, PCGS decided to attribute a variety for a particular coin. Then later, an official CPG entry arrived. So when PCGS started attributing the CPG variety, they made it a child entry of the original PCGS variety, which is the same coin. You can find that ledger arrangement on many coins from 1940-1969 in varying denominations. Probably they can't just delist the original PCGS variety because there are still a ton of slabs out there that still have the original attribution. But from the CPG point forward all new slabs for that variety were issued by the FS-### designation.

In the quote you has the PCGS explanation for QDO. Why the different prices? = marketing.

Any how: the 105 it is under the main QDO and the PCGS always the second line has lower estimated market price. I can not answer why, I asked my self from long time but never ask PCGS because the prices are dirrect proportional with the demand.

Me I know only one QDO for 1964 D.

Yeah, I totally understand, because I had the exact same experience with nickel varieties. There's really two separate issues. First, the price estimates for the original PCGS attribution don't match 1:1 with the attached CPG variety price estimates, even though the coins are identical.

But that ultimately doesn't matter much, because second, the prices in their grid are completely disconnected from auction results for most grades of the coin. I think the mid-high MS grade usually maps adequately. But then the other grades are just derived as a percentage of the "reference" number. Even so, there are usually only 5-10 auctions listed for each grade, and their values can range widely. In doing research on a 1966 SMS DDO recently, you can see that the Great Collections auctions have considerable variation, but also see that there are way more PCGS slabs sold than PCGS bothers tracking.