Oh boy, do I get a kick out of this bizarro button with its bang-up fusion of plastic and stippled metal. The middle piece is chocolate Bakelite and I'm no expert when it comes to metals, but I believe the four puffy side parts are brass. It's almost like a chunk of brown Bakelite nestled itself into a steely, freckled pillow. I have never seen another button like this one. circa 1930.