22L Blue Four Hole Casein Buttons

Set of six. 1930s vintage blue casein buttons. Four-hole sew-through buttons. Measure approximately 22L, 22 lignes, 13.9 mm, or 35/64 inches.

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 it was a slow process, and after World War II, newer plastics became more popular. The production of casein plastics all but ended after 1945. We combine shipping and invite you to visit our other listings. 

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