A little help!

[kickstart]

I found these last week and I was wondering if they
are considered error coins and how they might have been made.
Any help will be appreciated.

 

[Immy]

Definitely "after-Mint" damage. Looks like they've been in a fire, which can cause surface bubbling like that.

 

[Sheldius]

I found one very similar and concluded "fire" as well. I can even see the hole the gases escaped through after they heated up. Maybe we are into a bacth that come from a salvage.

HH.