22L Set of 23 Four-Hole Speckled Casein White Buttons, 9/16"

Set of twenty-three white casein buttons. Four-hole sew-through buttons.

Measure approximately 22L, 22 lignes, 13.9 mm, or 9/16"

Invented in 1897, Casein milk plastics are a type of plastic made from a protein called casein found in milk. They were popular in the early 1900s, but making them was a slow process, and after World War II, newer plastics became more popular. The production of casein plastics all but ended after 1945.

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