These were sifted out of a large button pile that I accumulated from four or five garage sale purchases.I'm not a collector or knowledgeable about buttons, but I believe the bulk is early plastic/acrylic/lucite, but there are also mop, metal, casein, celluloid, wood, glass, and I think china or porcelain.One of the mop ones (starburst) is signed on the back with a hand carved 'H.' See pics.
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