Opinions On This 1964 Mint Set

I was going through my coins I acquired a few years back and came across this gorgeous 1964 set I rescued from a frame that's seen better days. Even though the frame was badly damaged/rotting, I remember thinking how incredible the coins looked! So I tossed the frame and put the coins with my other Kennedy sets.
Here is the front and back:





I usually like to buy old sets like this, store the bullion and sell some of the mint examples/varieties that collectors want so that I can stack at a discount price. But I put these aside because they were much more vibrant than any 1964 mint set I compared them to... and I've been through a lot.
When I read up on something called the "1964 SMS sets" and saw how they're described in auction listings, my mind went IMMEDIATELY to what I had found, because you don't have to search for any die-markers to know that it's something "different", as stated.

But I pulled them out anyway, and, low-and-behold, there was the "dangling 4" :)
All the other die polishing lines were easily identified, extremely fine, and so numerous that they kind of resemble the surface of a stainless steel sink in how its scratches dance under a rotating light.
Other easily identifiable marks - DDO, reverse DP line from the F to A between "OF AMERICA" (with a series shooting downward past the arrows), the "Straight G", the interrupted rays - everything is there, of which I'll show below:






The only problem is that they were held in by tape from the back. I remember it crumbling when I touched it, and the heat over the years must have melted some of the adhesive onto the reverse of the coins. I haven't tried cleaning them, so I have no idea how difficult it may be.. but I suppose I should send them in for conservation.
I just hope that the process doesn't remove the lovely toning.

Here are some comparison photos with mint state examples:





Thank you for the comments!