When did men's pants get zippers?

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Tags

1. #north
2. #world
3. #definitely
4. #europe
5. #1930s
6. #america
7. #zippers
8. #inventions
9. #zipper
10. #until
11. #widely
12. #common
13. #pockets
14. #1920s
15. #clothing
16. #children
17. #buttons
18. #trousers
19. #buttonholes