Seventy views and no comments? Hard to see the little pic and hard to date partly because you also didnt give us a back pic or the backmark but its probably no matter because its definitely civilian. We have had this button posted here many times before. The anchor the tip off. Its very common old 20th century fashion blazer button with the Navy motiff, still made today. I found a small one in my backyard. If you need to see a link let me know. Green check.