✅ SOLVED Navy button?

[kccj76]

Found this at a property in Independence, MO built in 1843. It appears to be the front half of a 2-piece button, but seems to be aluminum? Either that or seriously thin brass. Anyone? Buehler? Thanks in advance.

 

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[duggap]

I'm pretty sure that is a fashion button.

 

[BuckleBoy]

Yep. Modern blazer button.