series of <#defin=definitive> <#stamp=stamps> begun in 2000 with the 10¢ Joseph Stilwell, <#scott=Scott> 3420.

one of several types of <#grill=grills> used in the 19th century, about 12 x 14mm in size.  Example: <#scott=Scott> 84.

<#nondenom=nondenominated stamps> issued in 1988 with an assigned <#postage> value of 25¢.

<#coil=coil stamps> with <#perf=perforations> at the sides, as opposed to <#endwise=endwise coils>.

a letter mailed within a city at a <#rate=rate> sometimes less than the regular <#firstclass=first class> rate.  Such local letters are of two types: those mailed in cities with <#carserv=carrier service> and those mailed in cities without carrier service.  Some form of local letter rate was in existence from 1863 to 1968.  See also: <#dropletter-gen=Drop Letter>.