island under U.S. administration from 1899 to 1902, and for which <#overprint=overprinted> U.S. <#stamp=stamps> were issued.

<#nondenom=nondenominated stamps> issued in 1995 with assigned <#postage> values of 5¢, 20¢, 25¢ and 32¢.

nickname for <#airmail=airmail stamps> of 1926-1927 (<#scott=Scott> C7-C9) that include a map in their <#design=design>.

a coin operated, self-service <#pitneybowes-gen=Pitney Bowes> machine that imprinted a <#meter=meter> and retained mail for collection.  It was primarily used in the 1940s.

Williamsburg, Pennsylvania based manufacturer of <#stampenv=stamped envelopes> from 1964 to 2008.