A novelty coin Elongated cent with the initials F.B. which stand for a Mr. Frank Brazzel. Seemingly made for a Mr. Frank G. Spadone who was a coin dealer from NJ and author of Varieties and Oddities coin book from 1963 2nd ed.
Do you think that the marks are from an old type of cancelling machine (similar to waffling), or just PMD?
Just PMD on my cent. I suspect the marks/lines to be from a set of vise jaws designed to hold parts/materials from moving while being worked on due to the line being in two different directions, but I do not have any proof of that being true. I am only assuming that both sides were indented at the same time. Does your dime have any marks on the obverse?
What's interesting about those striations is that they run perpendicular to each other obverse vs. reverse. If they are parallel, like they would be on a tool, your reverse is rotated 90 degrees. Z
The indent at the bottom of Abe's lapel can be seen on the reverse at the top of the word ONE, gauging from the angle of that line being parallel to the ONE I think it has a slight rotation of 10°-15°. I don't know if anyone would call it Visually Enhanced, but it is Interesting to me and I do enjoy having it.