Now showing: United States - Postage stamps (1970 - 1979) - 7 stamps.
19. January WM: None Perforation: 11
2. August WM: None Perforation: 11
29. October WM: None Perforation: 11
10. November WM: None Perforation: 10½ x 11
10. November WM: None Perforation: 10½ x 11