"First Strike"

[apush]

Could someone please give me the low-down on what "First Strike" is and why it is important in coin collecting? I get the jist of it, but unsure to what degree it is significant.

Many thanks,
apush

 

[Mackaydon]

apush,
This may be helpful in answering your question:
First Strike Coins - What Does the First Strike Designation Really Mean
Don.......