Gallery›National Postal Museum›15c Washington double line watermark bottom plate block of six
15c Washington double line watermark bottom plate block of six
National Postal Museum

15c Washington double line watermark bottom plate block of six

1909

paper; ink (pale ultramarine)/ engraving; gum
National Postal Museum
CC0 — Public Domain
National Postal Museum

Bottom margin plate block of 6 15-cent stamps; plate number 4951; imprint

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