On a collectable one, the devices will fall over the edge of the coin:

Also you will see weakness on on the opposite side of the coin because that area didn't get the full strike because of the wrong location of the hammer die:

When you can spot the weakness on the opposite side, then they are collectable:
CoopHome:
What to look for on a collectable MAD coin?
Edited by coop
07/22/2021 5:29 pm