Need help identifying button found today

[Indiana Mark]

Not found by me, but a friend that has scored permission to hunt an 1800s property. House will be demolished sometime in the near future.
Kind of looks like an early navy button to me? He only found the front. The back is missing.

Thanks in advance for any help IDing this find. Era in history that it is from would be nice also.

 

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[Old Pueblo]

US Navy button. They made them a long time. Someone else here will be able to tell you more.

 

[CRUSADER]

Most likely fashion/blazer button in the Navy style.

 

[trapperart]

Congrats on the button

 

[nhbenz]

As Crusader suggested it is a fashion button, as described in this thread: http://www.treasurenet.com/forums/what/423755-civil-war-navy-button.html

 

[Bill D. (VA)]

A agree with the modern blazer button ID, especially due to the rusted out and missing iron back.