Maybe, and maybe not. It would really depend on how the pressure was applied and at what points. Think of how a weak strike affects a coin, or...
I would think the why would be obvious - so they could get more money out of the coin than they could otherwise.
I think perhaps the most likely cause of these marks was deliberate action taken after minting. For example, placing the coin between two pieces...
Roller marks that criss-cross at right angles ?
I've paid that (for each) for several of them !
Don't forget the last sentence of his initial post - Learning how to price toned coins includes all toned coins. It also includes not paying a...
There are exceptions to almost any rule. And yes, I have always agreed that you can sometimes find real Gems in any slab. But you have to know...
If just looking at one side I would agree it may have been struck through a piece of cloth. But I see no way it could have happened on both sides...
Separate names with a comma.