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Watermarked Single Line USPS (191). Perforation 12. |
E3: Deep Ultramarine |
Watermarked Single Line USPS (191). Perforation 10. |
E4: Deep Ultramrine |
E4a: Pale Ultramrine |
Unwatermarked. Perforation 11. |
E5: 20c Ultramarine |
E5a: Pale Blue |
E5b: Dull Violet |