Arago: Exhibits

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What is a Z Grill?

Philatelist William Stevenson assigned a letter name to each pattern of stamp grill, starting with the A grill. Stevenson gave the Z grill its name because he didn’t know when it was used. The letter Z has nothing to do with its appearance.

A Z grill has between 221 and 252 pyramid-shaped points that form a rectangular grid covering about a third of a stamp. The points in a Z grill have a horizontal rooftop that is not found in any other grills.

1c Franklin Z. Grill single

Miller Z Grill Back

1c Franklin Z. Grill single

Miller album page with various Z grills from his collection