mail intentionally dropped from an aircraft for forwarding to its destination.

1.) an impression on an <#engraving=engraved> printing <#plate> caused when a <#tranroll=transfer roll> accidentally touches the blank plate before being properly positioned.  This results in a narrow band of doubling across the <#design>.  2.) one or more entries on a plate that are lower than intended and lower than the other entries on the plate.

the printing of <#intaglio> <#stamp=stamps> on paper with low moisture content.  Dry printing was first used at the <#bep=BEP> in 1953.  All <#bureau=Bureau Issues> have been dry printed since the late 1950s.  Compare: <#wetprint=Wet Printing>.

<#revenue=revenue stamps>, officially known as "United States Migratory Bird Hunting and Conservation" stamps, issued annually, and required to be signed by hunters and affixed to their hunting licenses.  Collected both on and off license.  <#scott=Scott> RW.

see <#mutecancel=Mute Cancel>.