While searching a BU Roll of 1964-D LMCs, I found 23 of these coins with doubling on their reverses, but I could not exactly match this variety with the existing DDRs on the usual reference web sites.
The doubling is very, similar to other DDRs for this date and mint, but the die marker on my coin(s) that I found the most obvious were the die scratches around the date and not other previously listed DDRs had this feature.
Mr. Daughtrey at CopperCoins assisted me with confirming that the features on my coin were, in fact, hub doubling, and since CopperCoins is not accepting new submissions, I sent my coin to Mr. Wexler at DoubledDie . com .
Mr. Wexler also confirmed that it is a new DDR for this date and mint and he has designated it as WDDR-045.
The reverse is showing a class 2 DDR. One of the perils of searching for doubled dies on Lincoln Cents, on the class 2 doubled dies. The later the die state is, the weaker the doubling appears. It actually wears off the the devices on the die because it is on the areas where the most wear happens on the dies. But because if wears off the outer edge devices, the areas inside the central areas of these class 2 doubled die will still show when the dies wear.
Light angles can help. Sometimes when taking images on RPMs. With the light at 12:00 on a coin, the 6:00 area is dark looking. So rotating the coin can help to show the opposite area. But a secret I rarely use of to use two lights. On normal at 12:00 and on a bit further away at 6:00 to warm the darker area. Here is an example:
The secret is to keep the second light at the right angle, but not as close. To enlighten, but not spotlight. I seldom use this, but always nice to know when you need it.