a plate with pins that perforates a complete <#sheet> or <#pane> of <#stamp=stamps> with a single stroke.  Its name comes from its resemblance to the farming implement of the same name.

a print made from a <#die> that has not yet been completely engraved, generally made to check the phases of engraving, also known as a <#progproof=progressive die proof>.

see <#bear=Bear Stamps>.

<#revenue=revenue stamps> issued in 1871 (<#scott=Scott> R103-133) printed by <#carpenterjosr-gen=Jos. R. Carpenter> on paper with <#silkpaper-gen=silk fibers>.

hidden images on <#stamp=stamps> that can be viewed through a special lens available from the <#usps=USPS>.