United States
Now showing: United States - Official Penalty Mail (2000 - 2009) - 6 stamps.
27. February WM: None Perforation: 9¾ vertical
2. August WM: None Perforation: 9¾ vertical
8. March WM: None Perforation: 9¾ vertical
29. September WM: None Perforation: 11¼
25. June WM: None Perforation: 9¾ vertical
24. February WM: None Perforation: 11½ x 11