Which button and how old?

[damiani1]

Found this large button and curious about how old or which kind of button it is. Thanks

 

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[HutSiteDigger]

Got a picture of the back with the shank ?

 

[damiani1]

Here's pic

 

[G.A.P.metal]

Tombac button....google it !
Gary

 

[damiani1]

Very cool I thought it was very modern