any ideas im stumped

[corben1120]

found these today, pretty sure the one is a flat button but why the iron piece in the back

 

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[wvwildman]

nice button congrats happy hunting

 

[corben1120]

thanks, i just wish i could find something that i can tell the age and would love to date to the civil war.

 

[parsonwalker]

Re: the iron in back - is that a shank I'm seeing? If so, I've seen buttons with a small piece of iron, copper, whatever, through the shank. You stuck the shank through the cloth or leather and stuck something through it and sewed THAT. Made the button much harder to lose or come off. Didn't work on THIS button though, huh! Mostly, I've seen that done with leather.

 

[old digger]

Your first item looks like a broken collar and berring from a bicycle. (handlebar)