Bicentennial Kennedy Half-Dollar With Doubling And Tone Shift

I agree with Machine Doubling on both sides of the coin. Nothing is enlarged, but reduced in size. Not seeing DDD. ( Die Deterioration Doubling)

Only one listed on Variety Visa, but it is a proof not the business strike. 1976-S
http://www.varietyvista.com/12%20Ke...6SDDR001.htm
Take a look and see what a DDR could look like on that reverse. (note the smaller devices)

Barlow, please take a look at the link to Machine Doubling. It will help you understand what exactly it is.

I should also note that the "lighter" of the two pennies weighs 2.89 and the heavier 3.1.

Some of the 1957-D cents have a monster MD issue that I call push doubling:



But on your coins, it looks like a contact mark altered the devices. On the first coin on the 'L' area, you can see a contact mark on the rim of the coin to the left of that device. This is just damage. On the first coin on on the date area, there also appears to be damage to the '9' on the date. On the second coin the date the '9 & 5' both looks like they took a hit. I think they are both normal coins, but the color of the coins are distracting you, also the contact marks as well. So when I question a coins sizes of devices, I use a side by side process of a normal coin image cropped horizontally to the same width of the outside devices, then compare each one with a normal set of devices. In this case, You could put the normal coin in the center and put one below the normal coin and one above the normal coin. Then you can see them side by side:
Sometimes horizontal:


Sometimes vertical:



Sometimes both:


This allows you to see without taking your eyes off the image to look somewhere else and loose the exact sizes when not having them side by side. Seeing is often understanding.

The damage to the devices can make them look different/wider/taller. That is why I suggested the side by sides. Make all horizontal with the date tops, crop to the outside widths and exact size them, and that will help:
coin 1
normal coin
coin 2

Having them in that position you will be what is going on.

I just checked Variety vista. Seems like most of these doubled dies were on Liberty. Only two were the dates affected.
http://www.varietyvista.com/01a%20L...201957-D.htm

I think I'm starting to understand. Damage cuts away. DD adds. Still, that second one looks like legit doubling to me. Am I mistaken?