I Think I Have It //2000-P Sag $1

It's Machine Doubling. It's flattened, doesn't have notching at the corners, and takes up part of the normal profile of the letters. I hope you're keeping all these machine doubled examples as educational pieces, then going through them every time you find something to compare the characteristics of the doubling. That's the only way you're likely to learn and know the difference.

The limited number of devices affected is probably from the amount the coin stuck to the die, the exact angle of its ejection, and the direction the devices face. Because the problem occurs in a split second, it can appear a bit different from coin to coin. Main things to follow are the common rules associated with typical Machine Doubling:

1. The doubling is flattened and shelf-like.
2. The doubling coupled with the letter doesn't take up space wider than a normal letter.
3. There is no notching at the corners of the letters.