WW1 or WW2 button?

[Ace 350]

I found this today in a field. I was wondering what era it's from. The back of the button has writing on it but I can't make out what it says.

 

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[Pointman]

I am not sure if this link will help you, but anyway it was posted on T-net by someone before:

Button Back Marks

 

[DIE HARD]

Definently looks WW1