'60 Proof Jefferson With DDR

It's a DDR alright. There are several 1960 doubled die proofs.
I think you have WDDR-014

nfine, focus on the serifs. They are some of the fattest I've ever seen on the reverse lettering on a Jefferson.

I think this is the die marker for the DDR-023 but light spread with extra thickness doesn't seem to match my EPU doubling.

It is a minor DDR.

The 1960 WDDR-034 is a strong doubled die.
https://www2.briansvarietycoins.com...tings/cat/33
Drop down to WDDR-034. Note the first image. The doubling enlarges the bottom of the devices.
A closer view of your coin might reveal the differences. Try making a side by side with the same devices rotated to the same size? That would show more on how close your coin is to this die number.

Here are an image from the PCGS web site that are very large:

Here is some hub doubling that should be present if it is this same die:

The devices on the outside edge get affected more by die wear, but the center hub doubling remains more intact longer. So if you see this hub doubling, it maybe this die. If not, then it maybe another die. I just can't tell from the images provided so far. But it does look stronger than the first images showed me.

I'm not sure if it is that die or not. It maybe a different one. You might want to ask Brian about this one to see what he thinks? The fields are not showing that much die wear, so I still question if it is that die or not?