Gutter in philately (stamp collecting) is a space between printed stamps. Gutters may separate sheet of stamps in panes. They may, or may not, have some printing. The gutter between the stamps is often the same size as the postage stamp.
There are other related philatelic terms:
- Gutter pairs are two stamps separated by a gutter.
- Gutter block is a block of at least four stamps separated by a gutter.
- Gutter margin is a margin dividing a sheet of stamps into separate panes.
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