印刷方法
1 色, 2 色, 4 色, 5 色, 6 色
Attachment
butterfly clutch / safety pin
Process
soft enamel, real cloisonné, printing, engrave, photo etched, etc
Back side
Smooth, mesh, back letters, polishing, engrave, etc
Material
Copper, Zinc alloy, iron, stainless steel, aluminum, pewter, etc