Would anyone know about these militaty items and their value?

[treasurehuntr2]

Could someone Id these things and estimate their value.

 

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[Mackaydon]

In the bottom pic, what is the letter after "CR"

 

[treasurehuntr2]

In the bottom pic, what is the letter after "CR"

It is my best call that it is a "k"

 

[Mackaydon]

The CR (X) spacing is irregular, so I was thinking it may not be a letter, but a number--like '8'.
Are there any marks on the reverse side?
The English word for 'armes' in French is 'arm' which made me think this is a French buckle designating the branches of military service--somehow.
Don........

 

[vayank54]

Is the first button pewter or hard rubber? It looks like it might be one piece because of the chips on the side. The second and 4th I believe are civilian blazer buttons and the 3rd is a US army great seal button probably post WWII. the buckle I have no idea on.

 

[vwayne1]

The second one ( we the people ) is a modern pin givin out by the NRA.