Button identification

[nova]

Was wondering if anyone can ID this button. It is a little larger than a 1/2 dollar. The back is gobbed with corrosion/rust

 

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[Bramblefind]

I found one here with the same design on the border.

http://www.wtv-zone.com/julia801/Site/Metal.html

"Cleopatra & the Asp". Heart Border.1-7/16", Tin lacquered back, loop shank.

Order #WM1-74

$18.00