50c Chicago Zeppelin (C18). Bottom right pane of 50 with bottom plate no. 21172, stamps Mint N.H. except position 50 with adherence on gum (that stamp also has a heavy gum crease), two small hinge slivers in the bottom right selvage, one of which reinforces a small tear next to position 45, several well-centered stamps, a few large gum skips in the second and fifth rows, overall Very Fine appearance, Scott value approximately $3,870.00

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