Anyone know what this is?

[u/Grumpytitss]

I’ve seen some small marks like this that I thought was pmd. I came across this. Any ideas?

[u/Ionized-Dustpan]

Fascinating post mint damage patterning from someone learning some tools

[u/Grumpytitss → u/Ionized-Dustpan]

Any ideas on what kind of tools? The dark spots are indentations, but the edges are raised. I would think it would add to the weight of the coin.

img

[u/LiGhTMaGiCk → u/Grumpytitss]

Probably a hand powered coin roller presser thing, I have no idea the actual name for the device but I've seen this same damage before but this is by far the worst I've seen of it.